Hi Neil,
1) You could ask for the count of each listed item in a column.
something like:
SELECT item, count(item) from parts GROUP BY item;
2) you could then use
SELECT id,item from parts WHERE item = 'xxx';
to review the double entries.
This is just a general sample, perhaps if you give mo
Title: RE: duplicate records check
Hi Neil,
try something like this
SELECT
FROM
GROUP BY
HAVING COUNT(*) > 1
Mit freundlichen Grüssen
Frank Kalis
Asset Management
ProACTIV___
CiV Versicherungen * PB Versicherungen * PB Pensionsfonds
Insert.
PB
-
- Original Message -
From: John Griffin
To: Steve Marquez ; MySQL List
Cc: PHP eMail List
Sent: Friday, June 06, 2003 2:51 PM
Subject: RE: Duplicate records
Hello Steve,
Do a select on the record before you insert it. If the record does not
exist in the
You can always catch the Duplicate Key error and respond accordingly in
your PHP script.
Regards,
Mike Hillyer
www.vbmysql.com
-Original Message-
From: Steve Marquez [mailto:[EMAIL PROTECTED]
Sent: Friday, June 06, 2003 1:41 PM
To: MySQL List
Cc: PHP eMail List
Subject: Duplicate records
Hello Steve,
Do a select on the record before you insert it. If the record does not exist in the
database (i.e. mysql_num_rows () == 0) than it is safe to do the insert.
John
-Original Message-
From: Steve Marquez [mailto:[EMAIL PROTECTED]
Sent: Friday, June 06, 2003 3:41 PM
To: MySQL L
any reason not to select distinct into a tmp table?
On Sun, 10 Feb 2002, DL Neil wrote:
> Rich,
>
> > How does one go about removing one of two identical records in a MySQL
> > database? My mistake in an earlier database was not applying a unique
> > number to each record (1, 2, 3, ---). I kn
A quick method is to create a new table:
CREATE TABLE newtable SELECT DISTINCT * FROM oldtable;
note; manually verify newtable has your data. Then proceed:
DROP TABLE oldtable;
CREATE TABLE oldtable SELECT * FROM newtable;
DROP TABLE newtable;
-Original Message-
From: Rich [mailto:[E
Dan,
[I've cc-ed this to the list and to Rich - who asked the original question]
> You can do the following to remove duplicates:
>
> - create table foo as select distinct cols from
> table_name_containing_duplicates;
> - drop table_name_containing_duplicates;
> - alter table foo rename to table_
Hi,
You can try to use ALTER IGNORE TABLE syntax :
ALTER IGNORE TABLE your_table ADD UNIQUE(Id);
Regards,
Jocelyn Fournier
- Original Message -
From: "Rich" <[EMAIL PROTECTED]>
To: "MySql" <[EMAIL PROTECTED]>
Sent: Sunday, February 10, 2002 5:31 PM
Subject: Duplicate Records
> How do
Rich,
> How does one go about removing one of two identical records in a MySQL
> database? My mistake in an earlier database was not applying a unique
> number to each record (1, 2, 3, ---). I know it's possible to use the
> DISTINCT operator to show only one of the identical records in a resul
avoid duplicates.
Regards,
Dan
> -Original Message-
> From: DL Neil [mailto:[EMAIL PROTECTED]]
> Sent: Monday, 11 February 2002 8:30 a.m.
> To: Rich; MySql
> Subject: Re: Duplicate Records
>
>
> Rich,
>
> > How does one go about removing one of two identica
Hi,
You can try to use ALTER IGNORE TABLE syntax :
ALTER IGNORE TABLE your_table ADD UNIQUE(Id);
Regards,
Jocelyn Fournier
- Original Message -
From: "Rich" <[EMAIL PROTECTED]>
To: "MySql" <[EMAIL PROTECTED]>
Sent: Sunday, February 10, 2002 5:31 PM
Subject: Duplicate Records
> How do
Rich,
> How does one go about removing one of two identical records in a MySQL
> database? My mistake in an earlier database was not applying a unique
> number to each record (1, 2, 3, ---). I know it's possible to use the
> DISTINCT operator to show only one of the identical records in a resul
First off,
You would need to add an "id" field, then set it to a primary key, then
set it to "auto_increment"
This will order them correctly
-Original Message-
From: Rich [mailto:[EMAIL PROTECTED]]
Sent: Sunday, February 10, 2002 10:31 AM
To: MySql
Subject: Duplicate Records
How does
Good morning Eve!
Sorry it has taken me so long to answer.
1: This is normal behavior. Your confusion here is thinking that an
auto_increment field is a record number.. It's not. It's simply a counter.
It does not ensure that you always have a contiguous sequence of numbers
starting form 1. It
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