Re: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables
Hi, Did you try to use something like this. mysql_query(SELECT DISTINCT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROM ((WLPbib LEFT JOIN WLPprofile ON WLPprofile.profileID = WLPbib.profileID) LEFT JOIN WLPaddress ON WLPaddress.publisherID = WLPbib.publisherID) LEFT JOIN WLPcountry ON WLPcountry.countryID = WLPaddress.countryID); The other thing that may help is to rearange the order of the tables in the FROM clause. Please check if some of the joins return more than one result - if you have more than one address for a publisher the query will return one row for every address. Hope this helps Dobromir Velev -Original Message- From: Mike Gifford [EMAIL PROTECTED] To: [EMAIL PROTECTED] [EMAIL PROTECTED] Date: Thursday, July 12, 2001 4:31 AM Subject: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables Hello, I posted this to the general list this morning got a couple of good leads, but they weren't able to actually fix the problem, so I'm posting here to the db list. I'm making some headway on joining three MySQL tables. However, when I run this query: mysql_query(SELECT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROM WLPbib LEFT JOIN WLPprofile ON WLPprofile.profileID = WLPbib.profileID LEFT JOIN WLPaddress ON WLPaddress.publisherID = WLPbib.publisherID LEFT JOIN WLPcountry ON WLPcountry.countryID = WLPaddress.countryID); I now get results in triplicate. ie. I'm getting three copies of the same title, firstName, organization, etc I somehow suspected that this should be the result with LEFT JOIN, but I'm not sure how to return a query without duplication. This is far better than what I had this morning (which was no response from the server). Thanks. I'm new to joining tables... Someone wrote back suggesting that SELECT DISTINCT could be used to to the job. Another person suggested that using UNIQUE(profileID) would make it look nicer. I wasn't sure how to use UNIQUE with the last JOIN as it isn't directly linked to WLPbib.. Any suggestions would be useful. Mike -- Mike Gifford, OpenConcept Consulting, http://openconcept.ca Offering everything your organization needs for an effective web site. Abolish Nuclear Weapons Now!: http://pgs.ca/petition/ It is a miracle that curiosity survives formal education. - A Einstein -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
RE: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables
What about... SELECT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROMWLPprofile, WLPaddress, WLPcountry WHERE WLPprofile.profileID = WLPbib.profileID AND WLPaddress.publisherID = WLPbib.publisherID AND WLPcountry.countryID = WLPaddress.countryID; I had a similar problems with a database I was working with... It had a main table with 29,000 listings, and I decided to normalize it to improve query times (split the records into diff. tables, one for each attribute of the record, associate the records back together by a common ID than spanned all the tables)... I ended up with an SQL query that spanned like 10 tables-- but it was -way- faster than one big table. There's an excellent article on Normalization on PHPbuilder -- http://www.phpbuilder.com/columns/barry2731.php3 If your WLP tables are very large, you may want to try using mySQL's EXPLAIN SELECT [rest of select query]... function to figure out the best (read: efficient) ways of performing this query... Indexes are definitely a must if you are dealing with a lot of rows... If not, you should be just fine with the above query-- which I -think- is equivilent... I don't have a ton of experience with SQL, so perhaps someone can better elaborate. Best of luck! -Original Message- From: Dobromir Velev [mailto:[EMAIL PROTECTED]] Sent: Thursday, July 12, 2001 3:01 AM To: [EMAIL PROTECTED]; Mike Gifford Subject: Re: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables Hi, Did you try to use something like this. mysql_query(SELECT DISTINCT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROM ((WLPbib LEFT JOIN WLPprofile ON WLPprofile.profileID = WLPbib.profileID) LEFT JOIN WLPaddress ON WLPaddress.publisherID = WLPbib.publisherID) LEFT JOIN WLPcountry ON WLPcountry.countryID = WLPaddress.countryID); The other thing that may help is to rearange the order of the tables in the FROM clause. Please check if some of the joins return more than one result - if you have more than one address for a publisher the query will return one row for every address. Hope this helps Dobromir Velev -Original Message- From: Mike Gifford [EMAIL PROTECTED] To: [EMAIL PROTECTED] [EMAIL PROTECTED] Date: Thursday, July 12, 2001 4:31 AM Subject: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables Hello, I posted this to the general list this morning got a couple of good leads, but they weren't able to actually fix the problem, so I'm posting here to the db list. I'm making some headway on joining three MySQL tables. However, when I run this query: mysql_query(SELECT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROM WLPbib LEFT JOIN WLPprofile ON WLPprofile.profileID = WLPbib.profileID LEFT JOIN WLPaddress ON WLPaddress.publisherID = WLPbib.publisherID LEFT JOIN WLPcountry ON WLPcountry.countryID = WLPaddress.countryID); I now get results in triplicate. ie. I'm getting three copies of the same title, firstName, organization, etc I somehow suspected that this should be the result with LEFT JOIN, but I'm not sure how to return a query without duplication. This is far better than what I had this morning (which was no response from the server). Thanks. I'm new to joining tables... Someone wrote back suggesting that SELECT DISTINCT could be used to to the job. Another person suggested that using UNIQUE(profileID) would make it look nicer. I wasn't sure how to use UNIQUE with the last JOIN as it isn't directly linked to WLPbib.. Any suggestions would be useful. Mike -- Mike Gifford, OpenConcept Consulting, http://openconcept.ca Offering everything your organization needs for an effective web site. Abolish Nuclear Weapons Now!: http://pgs.ca/petition/ It is a miracle that curiosity survives formal education. - A Einstein -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED
Re: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables
Hi Matthew, Matthew Loff wrote: What about... SELECT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROM WLPprofile, WLPaddress, WLPcountry WHERE WLPprofile.profileID = WLPbib.profileID AND WLPaddress.publisherID = WLPbib.publisherID AND WLPcountry.countryID = WLPaddress.countryID; I think that this is working now. I had a similar problems with a database I was working with... It had a main table with 29,000 listings, and I decided to normalize it to improve query times (split the records into diff. tables, one for each attribute of the record, associate the records back together by a common ID than spanned all the tables)... This one will likely have 10,000 to start with, so it is good to build in normalization... Didn't even know what the term normalization referred to earlier today. However, that is what I was doing with the table. I ended up with an SQL query that spanned like 10 tables-- but it was -way- faster than one big table. There's an excellent article on Normalization on PHPbuilder -- http://www.phpbuilder.com/columns/barry2731.php3 This is a good article. Even addressed the question that I fired off to Dobromir about linking various profiles to the same bibliography. One person can write many articles an article can have many authors, so I need to create a many-many table to link the articles to profiles. I think that this wil work: CREATE TABLE WLParticle2profile ( a2pID mediumint(9) NOT NULL auto_increment, bibID mediumint(9), profileID mediumint(9), PRIMARY KEY (a2pID) ) I'll then need to Re-jig the WHERE command to limit the number of returns... This would become SELECT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROMWLPprofile, WLPaddress, WLPcountry, WLParticle2profile WHERE WLParticle2profile.profileID = WLPbib.profileID AND WLPaddress.publisherID = WLPbib.publisherID AND WLPcountry.countryID = WLPaddress.countryID; I'm not sure this will work to tie in the relational table and then we come back to the problem with duplicate entries again... If your WLP tables are very large, you may want to try using mySQL's EXPLAIN SELECT [rest of select query]... function to figure out the best (read: efficient) ways of performing this query... Indexes are definitely a must if you are dealing with a lot of rows... If not, you should be just fine with the above query-- which I -think- is equivilent... I didn't know about this option: http://www.mysql.com/doc/E/X/EXPLAIN.html I find the MySQL.com site to be hard to read through.. php.net is much easier to understand in my experience. I don't have a ton of experience with SQL, so perhaps someone can better elaborate. I think that you did a good job.. However I think I'm still stuck with the same duplicate error now (well when I've expanded the code. Mike -Original Message- From: Dobromir Velev [mailto:[EMAIL PROTECTED]] Sent: Thursday, July 12, 2001 3:01 AM To: [EMAIL PROTECTED]; Mike Gifford Subject: Re: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables Hi, Did you try to use something like this. mysql_query(SELECT DISTINCT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROM ((WLPbib LEFT JOIN WLPprofile ON WLPprofile.profileID = WLPbib.profileID) LEFT JOIN WLPaddress ON WLPaddress.publisherID = WLPbib.publisherID) LEFT JOIN WLPcountry ON WLPcountry.countryID = WLPaddress.countryID); The other thing that may help is to rearange the order of the tables in the FROM clause. Please check if some of the joins return more than one result - if you have more than one address for a publisher the query will return one row for every address. Hope this helps Dobromir Velev -Original Message- From: Mike Gifford [EMAIL PROTECTED] To: [EMAIL PROTECTED] [EMAIL PROTECTED] Date: Thursday, July 12, 2001 4:31 AM Subject: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables Hello, I posted this to the general list this morning got a couple of good leads, but they weren't able to actually fix the problem, so I'm posting here to the db list. I'm making some headway on joining three MySQL tables
RE: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables
Mike-- I hate to suggest quick fixes :) but if all else fails, you can add a DISTINCT to the query. I've had to do it before... If you keep running into problems, and EXPLAIN ... doesn't resolve them, then perhaps you could send us a dump of the db structure... # mysqldump -d [database_name] dumpfile.sql Or if you need a UN/PW: # mysqldump -d [database_name] -u[username] -p dumpfile.sql That will dump the structure of the db, but not the actual data. Good luck! -Original Message- From: Mike Gifford [mailto:[EMAIL PROTECTED]] Sent: Thursday, July 12, 2001 10:48 AM To: Matthew Loff Cc: 'Dobromir Velev'; [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables Hi Matthew, Matthew Loff wrote: What about... SELECT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROM WLPprofile, WLPaddress, WLPcountry WHERE WLPprofile.profileID = WLPbib.profileID AND WLPaddress.publisherID = WLPbib.publisherID AND WLPcountry.countryID = WLPaddress.countryID; I think that this is working now. I had a similar problems with a database I was working with... It had a main table with 29,000 listings, and I decided to normalize it to improve query times (split the records into diff. tables, one for each attribute of the record, associate the records back together by a common ID than spanned all the tables)... This one will likely have 10,000 to start with, so it is good to build in normalization... Didn't even know what the term normalization referred to earlier today. However, that is what I was doing with the table. I ended up with an SQL query that spanned like 10 tables-- but it was -way- faster than one big table. There's an excellent article on Normalization on PHPbuilder -- http://www.phpbuilder.com/columns/barry2731.php3 This is a good article. Even addressed the question that I fired off to Dobromir about linking various profiles to the same bibliography. One person can write many articles an article can have many authors, so I need to create a many-many table to link the articles to profiles. I think that this wil work: CREATE TABLE WLParticle2profile ( a2pID mediumint(9) NOT NULL auto_increment, bibID mediumint(9), profileID mediumint(9), PRIMARY KEY (a2pID) ) I'll then need to Re-jig the WHERE command to limit the number of returns... This would become SELECT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROMWLPprofile, WLPaddress, WLPcountry, WLParticle2profile WHERE WLParticle2profile.profileID = WLPbib.profileID AND WLPaddress.publisherID = WLPbib.publisherID AND WLPcountry.countryID = WLPaddress.countryID; I'm not sure this will work to tie in the relational table and then we come back to the problem with duplicate entries again... If your WLP tables are very large, you may want to try using mySQL's EXPLAIN SELECT [rest of select query]... function to figure out the best (read: efficient) ways of performing this query... Indexes are definitely a must if you are dealing with a lot of rows... If not, you should be just fine with the above query-- which I -think- is equivilent... I didn't know about this option: http://www.mysql.com/doc/E/X/EXPLAIN.html I find the MySQL.com site to be hard to read through.. php.net is much easier to understand in my experience. I don't have a ton of experience with SQL, so perhaps someone can better elaborate. I think that you did a good job.. However I think I'm still stuck with the same duplicate error now (well when I've expanded the code. Mike -Original Message- From: Dobromir Velev [mailto:[EMAIL PROTECTED]] Sent: Thursday, July 12, 2001 3:01 AM To: [EMAIL PROTECTED]; Mike Gifford Subject: Re: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables Hi, Did you try to use something like this. mysql_query(SELECT DISTINCT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROM ((WLPbib LEFT JOIN WLPprofile ON WLPprofile.profileID = WLPbib.profileID) LEFT JOIN WLPaddress ON WLPaddress.publisherID = WLPbib.publisherID) LEFT JOIN WLPcountry ON WLPcountry.countryID = WLPaddress.countryID
Re: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables
Mike - I'm not certain but it sounds like you might be looking for GROUP BY. Do GROUP BY and then the columns that are identical in your results. - Ken At 09:46 PM 7/11/01 -0400, Mike Gifford wrote: Hello, I posted this to the general list this morning got a couple of good leads, but they weren't able to actually fix the problem, so I'm posting here to the db list. I'm making some headway on joining three MySQL tables. However, when I run this query: mysql_query(SELECT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROM WLPbib LEFT JOIN WLPprofile ON WLPprofile.profileID = WLPbib.profileID LEFT JOIN WLPaddress ON WLPaddress.publisherID = WLPbib.publisherID LEFT JOIN WLPcountry ON WLPcountry.countryID = WLPaddress.countryID); I now get results in triplicate. ie. I'm getting three copies of the same title, firstName, organization, etc I somehow suspected that this should be the result with LEFT JOIN, but I'm not sure how to return a query without duplication. This is far better than what I had this morning (which was no response from the server). Thanks. I'm new to joining tables... Someone wrote back suggesting that SELECT DISTINCT could be used to to the job. Another person suggested that using UNIQUE(profileID) would make it look nicer. I wasn't sure how to use UNIQUE with the last JOIN as it isn't directly linked to WLPbib.. Any suggestions would be useful. Mike -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables
Mike - In general, you should always be reading the manual first. From the SELECT syntax at http://www.mysql.com/doc/S/E/SELECT.html GROUP BY must be indicated before ORDER BY. So reverse the order of those portions. - Ken At 10:35 PM 7/11/01 -0400, Mike Gifford wrote: It looked good, but it gave me an error.. Sorry ... WLPcountry.countryID ORDER BY WLPbib.title GROUP BY WLPbib.bibID MySQL Error: 1064 (You have an error in your SQL syntax near 'GROUP BY WLPbib.bibID ' at line 10) Please contact the webmaster and report the exact error message. Session halted. Ken wrote: Mike - I'm not certain but it sounds like you might be looking for GROUP BY. Do GROUP BY and then the columns that are identical in your results. - Ken At 09:46 PM 7/11/01 -0400, Mike Gifford wrote: Hello, I posted this to the general list this morning got a couple of good leads, but they weren't able to actually fix the problem, so I'm posting here to the db list. I'm making some headway on joining three MySQL tables. However, when I run this query: mysql_query(SELECT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROM WLPbib LEFT JOIN WLPprofile ON WLPprofile.profileID = WLPbib.profileID LEFT JOIN WLPaddress ON WLPaddress.publisherID = WLPbib.publisherID LEFT JOIN WLPcountry ON WLPcountry.countryID = WLPaddress.countryID); I now get results in triplicate. ie. I'm getting three copies of the same title, firstName, organization, etc I somehow suspected that this should be the result with LEFT JOIN, but I'm not sure how to return a query without duplication. This is far better than what I had this morning (which was no response from the server). Thanks. I'm new to joining tables... Someone wrote back suggesting that SELECT DISTINCT could be used to to the job. Another person suggested that using UNIQUE(profileID) would make it look nicer. I wasn't sure how to use UNIQUE with the last JOIN as it isn't directly linked to WLPbib.. Any suggestions would be useful. Mike -- Mike Gifford, OpenConcept Consulting, http://openconcept.ca Offering everything your organization needs for an effective web site. Abolish Nuclear Weapons Now!: http://pgs.ca/petition/ It is a miracle that curiosity survives formal education. - A Einstein -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables
Sorry Ken, I'm trying to learn a few too many things at once. Switching it around eliminated the error message but not the duplication. I'm eliminating as much of the code as I can to see that it isn't coming from PHP. Thanks again for your help. Mike Ken wrote: In general, you should always be reading the manual first. From the SELECT syntax at http://www.mysql.com/doc/S/E/SELECT.html GROUP BY must be indicated before ORDER BY. So reverse the order of those portions. - Ken At 10:35 PM 7/11/01 -0400, Mike Gifford wrote: It looked good, but it gave me an error.. Sorry ... WLPcountry.countryID ORDER BY WLPbib.title GROUP BY WLPbib.bibID MySQL Error: 1064 (You have an error in your SQL syntax near 'GROUP BY WLPbib.bibID ' at line 10) Please contact the webmaster and report the exact error message. Session halted. Ken wrote: Mike - I'm not certain but it sounds like you might be looking for GROUP BY. Do GROUP BY and then the columns that are identical in your results. - Ken At 09:46 PM 7/11/01 -0400, Mike Gifford wrote: Hello, I posted this to the general list this morning got a couple of good leads, but they weren't able to actually fix the problem, so I'm posting here to the db list. I'm making some headway on joining three MySQL tables. However, when I run this query: mysql_query(SELECT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROM WLPbib LEFT JOIN WLPprofile ON WLPprofile.profileID = WLPbib.profileID LEFT JOIN WLPaddress ON WLPaddress.publisherID = WLPbib.publisherID LEFT JOIN WLPcountry ON WLPcountry.countryID = WLPaddress.countryID); I now get results in triplicate. ie. I'm getting three copies of the same title, firstName, organization, etc I somehow suspected that this should be the result with LEFT JOIN, but I'm not sure how to return a query without duplication. This is far better than what I had this morning (which was no response from the server). Thanks. I'm new to joining tables... Someone wrote back suggesting that SELECT DISTINCT could be used to to the job. Another person suggested that using UNIQUE(profileID) would make it look nicer. I wasn't sure how to use UNIQUE with the last JOIN as it isn't directly linked to WLPbib.. Any suggestions would be useful. Mike -- Mike Gifford, OpenConcept Consulting, http://openconcept.ca Offering everything your organization needs for an effective web site. Abolish Nuclear Weapons Now!: http://pgs.ca/petition/ It is a miracle that curiosity survives formal education. - A Einstein -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- Mike Gifford, OpenConcept Consulting, http://openconcept.ca Offering everything your organization needs for an effective web site. Abolish Nuclear Weapons Now!: http://pgs.ca/petition/ It is a miracle that curiosity survives formal education. - A Einstein -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables
Just build the SQL statement piece by piece instead of all at once. Be sure that your tables are setup properly, allowing you to make joins properly. Try not to rush, cause you might miss a couple of little things along the way. Kevin Johnson - Original Message - From: Mike Gifford [EMAIL PROTECTED] To: Ken [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Wednesday, July 11, 2001 08:00 PM Subject: Re: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables Sorry Ken, I'm trying to learn a few too many things at once. Switching it around eliminated the error message but not the duplication. I'm eliminating as much of the code as I can to see that it isn't coming from PHP. Thanks again for your help. Mike Ken wrote: In general, you should always be reading the manual first. From the SELECT syntax at http://www.mysql.com/doc/S/E/SELECT.html GROUP BY must be indicated before ORDER BY. So reverse the order of those portions. - Ken At 10:35 PM 7/11/01 -0400, Mike Gifford wrote: It looked good, but it gave me an error.. Sorry ... WLPcountry.countryID ORDER BY WLPbib.title GROUP BY WLPbib.bibID MySQL Error: 1064 (You have an error in your SQL syntax near 'GROUP BY WLPbib.bibID ' at line 10) Please contact the webmaster and report the exact error message. Session halted. Ken wrote: Mike - I'm not certain but it sounds like you might be looking for GROUP BY. Do GROUP BY and then the columns that are identical in your results. - Ken At 09:46 PM 7/11/01 -0400, Mike Gifford wrote: Hello, I posted this to the general list this morning got a couple of good leads, but they weren't able to actually fix the problem, so I'm posting here to the db list. I'm making some headway on joining three MySQL tables. However, when I run this query: mysql_query(SELECT WLPbib.bibID, WLPbib.title, WLPbib.publisher, WLPbib.publicationDate, WLPaddress.city, WLPaddress.state, WLPprofile.firstName, WLPprofile.lastName, WLPprofile.organization, WLPcountry.languageName FROM WLPbib LEFT JOIN WLPprofile ON WLPprofile.profileID = WLPbib.profileID LEFT JOIN WLPaddress ON WLPaddress.publisherID = WLPbib.publisherID LEFT JOIN WLPcountry ON WLPcountry.countryID = WLPaddress.countryID); I now get results in triplicate. ie. I'm getting three copies of the same title, firstName, organization, etc I somehow suspected that this should be the result with LEFT JOIN, but I'm not sure how to return a query without duplication. This is far better than what I had this morning (which was no response from the server). Thanks. I'm new to joining tables... Someone wrote back suggesting that SELECT DISTINCT could be used to to the job. Another person suggested that using UNIQUE(profileID) would make it look nicer. I wasn't sure how to use UNIQUE with the last JOIN as it isn't directly linked to WLPbib.. Any suggestions would be useful. Mike -- Mike Gifford, OpenConcept Consulting, http://openconcept.ca Offering everything your organization needs for an effective web site. Abolish Nuclear Weapons Now!: http://pgs.ca/petition/ It is a miracle that curiosity survives formal education. - A Einstein -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- Mike Gifford, OpenConcept Consulting, http://openconcept.ca Offering everything your organization needs for an effective web site. Abolish Nuclear Weapons Now!: http://pgs.ca/petition/ It is a miracle that curiosity survives formal education. - A Einstein -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
RE: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables
altho this may not help at all, rather than bashing away with php+SQL statements, i usually just pilot my sql in phpmyadmin, then once it works with set values (ie SELECT * FROM people WHERE personID='3' rahter than personID='$personID' or something) i can then drop that SQL into my script. HTH Beau // -Original Message- // From: Mike Gifford [mailto:[EMAIL PROTECTED]] // Sent: Thursday, 12 July 2001 11:01 AM // To: Ken // Cc: [EMAIL PROTECTED] // Subject: Re: [PHP-DB] Left Join is producing duplicate // results - MySQL // relational tables // // // Sorry Ken, // // I'm trying to learn a few too many things at once. // Switching it around // eliminated the error message but not the duplication. // // I'm eliminating as much of the code as I can to see that it // isn't coming from PHP. // // Thanks again for your help. // // Mike // // Ken wrote: // // In general, you should always be reading the manual first. // From the SELECT syntax at // http://www.mysql.com/doc/S/E/SELECT.html // GROUP BY must be indicated before ORDER BY. So reverse // the order of those portions. // // - Ken // // At 10:35 PM 7/11/01 -0400, Mike Gifford wrote: // // It looked good, but it gave me an error.. Sorry // ... // WLPcountry.countryID ORDER BY WLPbib.title GROUP BY WLPbib.bibID // // MySQL Error: 1064 (You have an error in your SQL syntax // near 'GROUP BY WLPbib.bibID ' at line 10) // Please contact the webmaster and report the exact error message. // Session halted. // // Ken wrote: // // // Mike - // I'm not certain but it sounds like you might be looking // for GROUP BY. Do GROUP BY and then the columns that are // identical in your results. // - Ken // At 09:46 PM 7/11/01 -0400, Mike Gifford wrote: // // // Hello, // // I posted this to the general list this morning got a // couple of good leads, but they weren't able to actually fix // the problem, so I'm posting here to the db list. // // I'm making some headway on joining three MySQL tables. // // However, when I run this query: // // mysql_query(SELECT // WLPbib.bibID, // WLPbib.title, // WLPbib.publisher, // WLPbib.publicationDate, // WLPaddress.city, // WLPaddress.state, // WLPprofile.firstName, // WLPprofile.lastName, // WLPprofile.organization, // WLPcountry.languageName // // FROM WLPbib // // LEFT JOIN WLPprofile ON WLPprofile.profileID = // WLPbib.profileID // LEFT JOIN WLPaddress ON WLPaddress.publisherID = // WLPbib.publisherID // LEFT JOIN WLPcountry ON WLPcountry.countryID = // WLPaddress.countryID); // // I now get results in triplicate. ie. I'm getting three // copies of the same title, firstName, organization, etc // // I somehow suspected that this should be the result with // LEFT JOIN, but I'm not sure how to return a query without // duplication. // // This is far better than what I had this morning (which // was no response from the server). // // Thanks. I'm new to joining tables... // // Someone wrote back suggesting that SELECT DISTINCT could // be used to to the job. // // Another person suggested that using UNIQUE(profileID) // would make it look nicer. I wasn't sure how to use UNIQUE // with the last JOIN as it isn't directly linked to WLPbib.. // // Any suggestions would be useful. // // Mike // // // // -- // Mike Gifford, OpenConcept Consulting, http://openconcept.ca // Offering everything your organization needs for an // effective web site. // Abolish Nuclear Weapons Now!: http://pgs.ca/petition/ // It is a miracle that curiosity survives formal education. // - A Einstein // // // -- // PHP Database Mailing List (http://www.php.net/) // To unsubscribe, e-mail: [EMAIL PROTECTED] // For additional commands, e-mail: [EMAIL PROTECTED] // To contact the list administrators, e-mail: // [EMAIL PROTECTED] // // // // // // // -- // Mike Gifford, OpenConcept Consulting, http://openconcept.ca // Offering everything your organization needs for an effective // web site. // Abolish Nuclear Weapons Now!: http://pgs.ca/petition/ // It is a miracle that curiosity survives formal education. - // A Einstein // // // -- // PHP Database Mailing List (http://www.php.net/) // To unsubscribe, e-mail: [EMAIL PROTECTED] // For additional commands, e-mail: [EMAIL PROTECTED] // To contact the list administrators, e-mail: // [EMAIL PROTECTED] // -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] Left Join is producing duplicate results - MySQL relational tables
phpMyAdmin is great! And I hear that they are coming out with a new version pretty soon (or is it here - haven't checked).. However I don't think that you can join tables in phpMyAdmin.. Perhaps I don't know the app well enough though. Mike Beau Lebens wrote: altho this may not help at all, rather than bashing away with php+SQL statements, i usually just pilot my sql in phpmyadmin, then once it works with set values (ie SELECT * FROM people WHERE personID='3' rahter than personID='$personID' or something) i can then drop that SQL into my script. HTH Beau // -Original Message- // From: Mike Gifford [mailto:[EMAIL PROTECTED]] // Sent: Thursday, 12 July 2001 11:01 AM // To: Ken // Cc: [EMAIL PROTECTED] // Subject: Re: [PHP-DB] Left Join is producing duplicate // results - MySQL // relational tables // // // Sorry Ken, // // I'm trying to learn a few too many things at once. // Switching it around // eliminated the error message but not the duplication. // // I'm eliminating as much of the code as I can to see that it // isn't coming from PHP. // // Thanks again for your help. // // Mike // // Ken wrote: // // In general, you should always be reading the manual first. // From the SELECT syntax at // http://www.mysql.com/doc/S/E/SELECT.html // GROUP BY must be indicated before ORDER BY. So reverse // the order of those portions. // // - Ken // // At 10:35 PM 7/11/01 -0400, Mike Gifford wrote: // // It looked good, but it gave me an error.. Sorry // ... // WLPcountry.countryID ORDER BY WLPbib.title GROUP BY WLPbib.bibID // // MySQL Error: 1064 (You have an error in your SQL syntax // near 'GROUP BY WLPbib.bibID ' at line 10) // Please contact the webmaster and report the exact error message. // Session halted. // // Ken wrote: // // // Mike - // I'm not certain but it sounds like you might be looking // for GROUP BY. Do GROUP BY and then the columns that are // identical in your results. // - Ken // At 09:46 PM 7/11/01 -0400, Mike Gifford wrote: // // // Hello, // // I posted this to the general list this morning got a // couple of good leads, but they weren't able to actually fix // the problem, so I'm posting here to the db list. // // I'm making some headway on joining three MySQL tables. // // However, when I run this query: // // mysql_query(SELECT // WLPbib.bibID, // WLPbib.title, // WLPbib.publisher, // WLPbib.publicationDate, // WLPaddress.city, // WLPaddress.state, // WLPprofile.firstName, // WLPprofile.lastName, // WLPprofile.organization, // WLPcountry.languageName // // FROM WLPbib // // LEFT JOIN WLPprofile ON WLPprofile.profileID = // WLPbib.profileID // LEFT JOIN WLPaddress ON WLPaddress.publisherID = // WLPbib.publisherID // LEFT JOIN WLPcountry ON WLPcountry.countryID = // WLPaddress.countryID); // // I now get results in triplicate. ie. I'm getting three // copies of the same title, firstName, organization, etc // // I somehow suspected that this should be the result with // LEFT JOIN, but I'm not sure how to return a query without // duplication. // // This is far better than what I had this morning (which // was no response from the server). // // Thanks. I'm new to joining tables... // // Someone wrote back suggesting that SELECT DISTINCT could // be used to to the job. // // Another person suggested that using UNIQUE(profileID) // would make it look nicer. I wasn't sure how to use UNIQUE // with the last JOIN as it isn't directly linked to WLPbib.. // // Any suggestions would be useful. // // Mike // // // // -- // Mike Gifford, OpenConcept Consulting, http://openconcept.ca // Offering everything your organization needs for an // effective web site. // Abolish Nuclear Weapons Now!: http://pgs.ca/petition/ // It is a miracle that curiosity survives formal education. // - A Einstein // // // -- // PHP Database Mailing List (http://www.php.net/) // To unsubscribe, e-mail: [EMAIL PROTECTED] // For additional commands, e-mail: [EMAIL PROTECTED] // To contact the list administrators, e-mail: // [EMAIL PROTECTED] // // // // // // // -- // Mike Gifford, OpenConcept Consulting, http://openconcept.ca // Offering everything your organization needs for an effective // web site. // Abolish Nuclear Weapons Now!: http://pgs.ca/petition/ // It is a miracle that curiosity survives formal education. - // A Einstein // // // -- // PHP Database Mailing List (http://www.php.net/) // To unsubscribe, e-mail: [EMAIL PROTECTED] // For additional commands, e-mail: [EMAIL PROTECTED] // To contact the list administrators, e-mail: // [EMAIL PROTECTED] // -- Mike Gifford, OpenConcept Consulting, http://openconcept.ca Offering everything
