ery for the sake of speed... especially since the
>value I needed was so tantalizing close in the VDBE struct.
The SELECT will be quite fast, chances are the required pages of
the unique index will still be in the cache.
In my opinion it is always better to write portable code, so I
would prefer to rely on generic SQL than on yet another
implementation specific API.
Just my 2 cents.
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On Wed, 31 Jan 2007 18:31:20 -0500, you wrote:
>Is cast documented on the sqlite website? I couldn't find it.
http://www.sqlite.org/lang_expr.html
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On Wed, 31 Jan 2007 17:30:29 -0500, you wrote:
>BTW, what is the concatenation operator?
Standard SQL: string || string
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nsion(X,Y) can be used in the
command line program.
I usually postprocess output by piping it through awk to solve
these kinds of problems.
sqlite3 databasefile outfile
>jim
HTH
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ot sure if there
>will be future releases of this or not)
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g database, try to create a new
one from sqlite3explorer.
I use it in combination with sqlite3.dll, version 3.3.12,
without any problem. I downloaded it 2006-03-13 and it still
works well.
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T
implement the
REGEXP operator.
The MATCH operator is a special syntax for the match() user
function. The default match() function implementation raises and
exception and is not really useful for anything. But extensions
can override the match() function with more helpful logic."
>Regards,
/Extension-functions-for-SQLite-in-C-for-free-tf3182921.html#a8833684
>Regards,
>Rick van der Lans
>
>-----Oorspronkelijk bericht-
>Van: Kees Nuyt [mailto:[EMAIL PROTECTED]
>Verzonden: Friday, February 09, 2007 10:55 PM
>Aan: sqlite-users@sqlite.org
>Onderwerp: Re: [sql
#x27;Habitats','','External','x
>100','Centroid',0,100,0.2,'Strong','Fuzzy Space','Minimum','Min-max');
>
> There are 14 fields and no extra space trailing t
>>fileall.sql
sqlite3 database3 http://www.sqlite.org/sqlite.html
>Thanks!
Hope this helps.
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stay keywords shouldn't be quoted at all.
If you choose your columnnames carefully (not contained in the
collection of reserved words), the [] could easily be filtered
out with sed or awk.
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|1
2|file1|0|2007-03-01|2007-03-02|2|2
2|file1|0|2007-04-01|2007-04-02|2|2
I don't know if it makes sense, but in sqlite-3.3.13 I didn't
get the error you mentioned.
Just guessing: In earlier version of sqlite the alias e can't be
used in the subselect, in other words: Support
ands on experience with Vista...
Perhaps you should install the software in directories outside
the ones "guarded" by Vista. I think "Program Files" and
"Windows" aren't safe anymore for people who want to be in
control themselves.
&
, webbrowsers (Firefox), embedded systems like PDA's, mp3
players etcetera. These are all enviroments where the users 1)
aren't especially careful 2) aren't willing or able to
handrecover a database. They even don't know it's there.
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NEW.product_id
)
WHERE ...
See also:
http://www.sqlite.org/cvstrac/wiki?p=UnsupportedSql
item 2005.10.06
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e 2 version 2' WHERE nkey == 2;
UPDATE notes SET msg = 'note 1 version 3' WHERE nkey == 1;
-- queries
SELECT * FROM sh_audit;
SELECT * FROM sh_status;
SELECT 'notes';
SELECT * FROM notes;
SELECT 'audit';
SELECT * FROM audit;
SELECT 'audit with timediff';
SELECT * FROM sh_audit;
>Thanks,
>
>Sam
>
I hope this helps.
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tion.
4) Triggers can't be forgotten, so the stamping will be more
consistent, much like constraints.
As a side note, I seem to remember all sqlite timestamps within
a transaction have the same value: the time at BEGIN
TRANSACTION. To me that is the most importan
sing a web interface,
http://www.mail-archive.com/sqlite-users@sqlite.org/
might suit your needs.
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e of this email is
>prohibited when received in error.
Exactly the way it says in about every message:
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pushed to me.
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not just the ones to be updated.
That is exactly what INSERT OR REPLACE does.
http://www.sqlite.org/lang_insert.html
http://www.sqlite.org/lang_conflict.html
>Chris
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On Thu, 23 Aug 2007 14:15:00 -0400, you wrote:
>On Thu, 23 Aug 2007 18:58:32 +0200, Kees Nuyt wrote:
>
>>Hi Chris,
>
>>On Thu, 23 Aug 2007 12:14:51 -0400, you wrote:
>
>>>On Thu, 23 Aug 2007 08:52:40 -0700, Gerry Snyder wrote:
>>>
>>>>Wi
DVBT_Frequency
DVBT_FrequencyTable
DVBT_FrequencyTableToFrequency
DVB_IPService
Version
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[snip]
> My own Skype installation doesn't show any trace of SQLite.
> Either they don't use it, or they've hidden it very well.
Oops, found it:
C:\Users\\AppData\Roaming\Skype\\dyncontent\bundle.dat
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synthetic
key for both in the application.
> Thanks in advance
> Nick
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OWID is
created [snip]
Note: this solution is not standard SQL and not portable.
For more or less protable solution you would have to use smart
trigger code.
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loading, sort your input in key order.
4) Tune your operating system and file system.
5) Adjust hardware.
Good luck
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ite.org/contrib
sqlite-networked
>Thanks,
>Mark
Hope this helps.
Regards,
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It is easy to materialize that number in any language you will
use around your SQL, even in a shell:
sqlite3 your.db "select * from testTbl;" | \
awk -v OFS='|' '{print NR,$0}'
1|1|d1
2|3|d3
3|4|d4
note: \ is linewrap
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0001
sqlite> select round(98926650.50001 -0.01, 1);
98926650.501
sqlite> select round(98926650.50001 -0.1, 1);
98926650.4
sqlite>
Oh, well, 9 digits of accuracy is way more than most
measurements we can do in daily life.
For money, use integers and express in cents / centimes or
something.
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27;;
Pictures:
http://www.forum.nokia.com/devices/pics/6233_main.jpg
http://www.nokia.com/search/images/logo_nokia_115_40.gif
(I didn't find a real good one)
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ROWID,t_name FROM testTbl;
1|d1
2|d2
3|d3
4|d4
DELETE FROM testTbl WHERE t_name='d2';
SELECT ROWID,t_name FROM testTbl;
1|d1
3|d3
4|d4
same picture..
Regards,
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ne a
separate table constraint UNIQUE (on,all,columns) ON CONFLICT
IGNORE.
The insert will fail. It depends on the conflict-clause what
happens.
Or you can use INSERT ... ON CONFLICT IGNORE.
http://www.sqlite.org/lang_conflict
On Tue, 04 Sep 2007 09:20:28 -0700, Gerry wrote:
>Kees Nuyt wrote:
>> On Tue, 04 Sep 2007 07:53:08 -0600, Scott wrote:
>>
>>> I have an application that is inserting a record every second. There
>>> are thousands of periods from a few seconds to hours lo
n every row you sqlite3_step()
into.
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com/sw/lemon/
http://www.sqlite.org/datatype3.html
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Not without the server mechanism.
The performance gain of a :memory: database is limited, one of
the reasons is that most operating systems will cache the
database file in memory anyway.
In general: when you really need a DB server, don't use SQLite.
http://www.sqlite.org/whentouse.html
&
s with t=111 and then do a
> search for b=222 with in that set or other way?
Perhaps you will find an explanation here:
http://www.sqlite.org/optoverview.html
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the command line tool.
http://www.sqlite.org/download.html
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s the best next thing to do either.
>
>Your feedback and input will be highly appreciated,
>
>- Kefah.
Most probably the UNIQUE INDEX on the TEXT column is the
culprit.
My first try would be to create and fill the table first, a
nks again,
>- Kefah.
Good luck.
>On Saturday 15 September 2007 00:25:03 Kees Nuyt wrote:
>> On Fri, 14 Sep 2007 23:20:53 +0300, you wrote:
>> >Dear All,
>> >
>> >I have been struggling with the performance of insertion in sqlite.
>> >
>> >Here we
person_id INTEGER 99 1
1 name TEXT 99 0
2 dtstampDATETIME 0 CURRENT_TI 0
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s is that try to sum strings, bcz the colums aren't
defined as numeric in the table definition.
>thanks,
>
>josé
Hope this helps,
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been initialized before, and if not, define a
proper schema.
The class methods for receiving messages could contain sqlite3
calls that use the database in some way.
You have to take care that every database should have a unique
filename, and that a specific node in the simulated network uses
t
gt;
>$123.40
>
>Is there a better way? I can't see any number formatting function in
>SQLite's repertoire.
Round comes closest, but is not exacly what you need.
select '$' || round( Amount ,2) from Invoice;
Two remarks:
Formatting and presentation is usually considered a tas
plication I'm trying
> to support.
> Thank you to anyone who might be able to provide this for me.
It's on the bottom of the download page:
http://www.sqlite.org/download.html
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On Thu, 20 Sep 2007 13:57:58 -0400, Liam wrote:
> It would be nice if the documentation gave a
> brief indication when a feature is added
> ("new in 3.5.0" unobtrusively somewhere).
Like in http://www.sqlite.org/34to35.html ?
--
checked.
The link isn't on the page anymore, but (as with many old
versions) the download is still available:
http://www.sqlite.org/sqlitedll-2_8_17.zip
I'm glad you managed to compile it by yourself.
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pages of 512 bytes to accomodate 3.5
MByte.
Ideally, the page_size should equal the allocation unit (for
Window: the cluster size of the formatted disk).
Also, if your rows can be large, a too small page_size would
cause overflow pages, and thus additional overhead
On Mon, 24 Sep 2007 10:35:51 -0700, you wrote:
>Kees Nuyt wrote:
>> On Mon, 24 Sep 2007 07:13:51 -0700, Gururaja Nittur wrote:
>>
>>
>>> Sqlite experts,
>>>
>>> I am running Sqlite version 3.4.1. I ran some performance tests and
>>> obs
On Mon, 24 Sep 2007 21:36:14 -0700, Gururaja Nittur wrote:
>On 9/24/07, Kees Nuyt <[EMAIL PROTECTED]> wrote:
>>
>> On Mon, 24 Sep 2007 10:35:51 -0700, Gerry Snyder wrote:
[big snip]
>> >I'm confused. With a bunch of INSERTs per transaction, the CPU usage can
'franklin' as (5,lin), meaning: take the first five
characters of the previous key and concatenate the rest.
- store 'fred' as (2,ed)
- store 'google' as (0,google)
- store 'gopher' as (2,pher)
This works nicely for la
QLite library 3.4.2
The only thing i can think of (wild guess) is your
php-cli uses another php.ini than the Apache module does.
Good luck !
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ckward pointers in order to do it.)
>>
>
>This issue keeps coming up so I did a wiki page.
>http://www.sqlite.org/cvstrac/wiki?p=ScrollingCursor
A true gem!
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age earlier
>
>-x-
>Chetana
This might be of help:
http://www.sqlite.org/cvstrac/wiki?p=ForeignKeyTriggers
http://www.rcs-comp.com/site/index.php/view/Utilities-SQLite_foreign_key_trigger_generator
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---
t_id INTEGER PRIMARY KEY,
t_name TEXT
)
SQLite version 3.4.2
Enter ".help" for instructions
sqlite>
Hope this helps.
Regards,
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of these details automatically."
And this is about the TCL transaction {} method.
>You might want to be a little bit more clear about the fact that [transaction]
>nests even though BEGIN does not.
The TCL transaction{} can be nested, the SQL BEGIN can't.
As
On Fri, 12 Oct 2007 01:00:32 -0500, you wrote:
>On Thu, 11 Oct 2007 13:33:35 +0200, Kees Nuyt wrote
>> On Wed, 10 Oct 2007 22:10:38 -0500, you wrote:
>>> You might want to be a little bit more clear about the fact that
>>> [transaction] nests even though BEGIN does not
c/wiki?p=PerformanceTuning
>Regards
>
>trax
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y don't have to escape quotes if you prepare /
bind the values.
>Web links:
>-Do you know good web tutorials, code samples,
>opensource projects showing how to use SQLite mainly
>with php and pdo ?
I am sure there are, but I don't know of any, up to now the
information in the PH
n't know if Control-D works on windows)
Control-D doesn't work in sqlite3.exe on windows, Control-C
does, both in the windows shell (CMD.EXE) and in msys
(mingw32) bash.
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y itself is enough.
>Pavel
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ge is malformed".
> Is there any command to check if the index
>or database in good condition.
PRAGMA integrity_check;
http://www.sqlite.org/pragma.html#debug
>Thanks,
>JP
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make sense.
@Joannek: When using group by, your select columns can only
use aggregate functions and the columns you group by.
Perhaps you meant to use ORDER BY here ?
>Pavel
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On Wed, 6 May 2009 00:40:22 -0500, "Jay A. Kreibich"
wrote:
>On Tue, May 05, 2009 at 11:46:38PM +0200, Kees Nuyt scratched on the wall:
>> On Tue, 5 May 2009 16:55:42 -0400, Pavel Ivanov
>> wrote:
>>
>> >Is it just me or somebody else is
>> &
could print messages by above way. But since
>yesterday, it's never printed anything. I even reinstalled my os system.
>I am pretty much confused with it. Could anyone give me some advice, please?
In your shell, type:
which sqlite3
Does the result point to the result of yur compilation of
sqlite3 ?
>Thanks so much.
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n here. Guessing:
To sort by the third column of your result set, use:
SELECT * FROM mytable ORDER BY name_of_third_column;
or
SELECT * FROM mytable ORDER BY 3;
>Thanks in advance.
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e any other unix utility.
Just give it a go. Experiment.
And enjoy.
>Thanks in advance
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nd line? As in:
# sqlite3 my.db
See also:
http://www.sqlite.org/quickstart.html
If you leave out the databasefilename, sqlite uses an
in-memory database, which is destroyed as soon as you
leave/quit/exit the command line tool program.
>Thanks
>rb
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On Wed, 6 May 2009 23:24:00 +0200, Daniel Wolny
wrote:
>2009/5/6 Kees Nuyt :
>> On Wed, 6 May 2009 23:01:24 +0200, Daniel Wolny
>> wrote:
>> It should be possible, sqlite sends its output to stdout, so
>> it works like any other unix utility.
>>
>> Just
SQLite
database. Very basic but fully functional nevertheless.
http://www.sqlite.org/cvstrac/wiki?p=SampleCode
Example C code for creating / writing to / reading from a
database.
>TIA,
>Nuno Magalhães
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O tag_link values (49,3);
SELECT app_name.id,app,COUNT(tag_link.tag_id) AS nrtags
FROM tag_link
INNER JOIN app_name ON (app_name.id = tag_link.app_id)
GROUP BY tag_link.app_id;
app_name.id|app_name.app|nrtags
30|a|1
39|b|1
49|t|2
331|d|3
>The parser returns no error, only seems to freeze. Tip
same application
('d') uses the same tag more then once. Is that on purpose?
In other words, it's not completely clear to me what you are
trying to accomplish.
>Regards,
>-steffen
>
>
>Kees Nuyt wrote:
>>
>> On Sun, 10 May 2009 13:51:29 -0700 (PDT), ckeen
&
php fragment to create a job with or without parameters ====
=== it's part of a class which extends PDO
=== I prefer php_pdo_sqlite_external
function enter_job($userid,$cmnd,$parlist,$ntuid,$ntpsw,$jobprio = 8){
$msg = '';
/* Execute a prepared statement by passing an array of values
--> */
$sql = 'INSERT INTO jobs (userid,cmnd,pars,jobprio) VALUES
(:userid,:cmnd,:pars,:jobprio)';
$stjob = $this->prepare($sql);
$this->beginTransaction();
$stjob->execute(array(':userid' => $userid, ':cmnd' => $cmnd,
':pars' => '@list', ':jobprio' => $jobprio));
/*
*
* This will accommodate up to 99 999 999 requests,
* then we have to reset by deleting the database.
* It will be rebuilt automatically
* 01234567 oO0
*/
$jobid = $this->lastInsertId();
$tsn = substr(1000 + $jobid,4,4);
if (isset($parlist)){
/* there are parameters */
$sql = 'INSERT INTO pars (jobid,partx) VALUES
(:jobid,:partx)';
$stpar = $this->prepare($sql);
if (is_array($parlist)){
/* we got a text array with params */
foreach ($parlist as $aval){
$stpar->execute(array(':jobid' =>
$jobid, ':partx' => $aval));
}
} else if (is_object($parlist)) {
/* we got a resultset from a query as paramlist
*/
while ($row = $parlist->fetch(PDO::FETCH_NUM)){
$stpar->execute(array(':jobid' =>
$jobid, ':partx' => $row[0]));
}
}
} else {
}
$this->commit();
/*
* ugly code to launch the dispatcher asynchronously using
* Windows schtasks.exe is left to the imagination of the reader
*/
}
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_fifo = > (id, fk_task_log)
>Table: task_status_log => (id, fk_task_log, status_code, time_stamp)
>
>And in psudo SQL:
>
>TRIGGER ON INSERT INTO task_log:
>BEGIN
>INSERT INTO task_fifo (fk_task_log) VALUES (NEW.id)
>END;
>
>TR
fore it can return the first row in the
resultset. Need I say more?
http://www.sqlite.org/cvstrac/wiki?p=ScrollingCursor
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imple, but not for me.
This is an n:m relationship.
If group has more attributes (columns) than just its number,
you need a third table: person_group.
Then join person with person_group where group_id != 1;
The person_group table could be called membership, if you
like.
>Thanks
On Tue, 26 May 2009 14:44:25 +0800, wying wy
wrote:
>Hi
>
>May I know if we can create index on a View?
You can't create an index on a VIEW.
A VIEW can be seen as a stored SELECT statement.
>Thanks in advance.
>wying
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tup, I cannot just drop the
>> tables. ( As the table which are present in the existing data base is
>> not known. )
>>
>> I am using sqlite3wrapped C++ library APIs.
>>
>> Thanks and Regards,
>> Souvik
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ny input on this?
ASCII versus UTF-8 or UTF-16?
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(a_id,b_id) the primary key to enforce that
constraint.
>Thanks
>Ralf
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sqlite, a weekly
peek at http://www.sqlite.org/cvstrac/timeline
is worth the effort.
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. WHERE stock_id = 1;
if sqlite_error()
INSERT INTO stock_tab SET (...) VALUES (...);
endif
COMMIT;
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y INSERT
statement, which has implications for your program flow.
http://www.sqlite.org/lang_insert.html
http://www.sqlite.org/lang_conflict.html
(You probably already read those pages, I included the links
for the convenience of other readers)
>Luiz
--
( Kees Nuyt
)
c[_]
e's a way to check if a transaction failed (for constraint or
>another error) and than rollback without clearing the error message
>returned by sqlite3_errmsg?
After a ROLLBACK; there is no error (ROLLBACK is succesful),
so the error message will be cleared.
You can use INSERT .... ON CONFL
e_id,table_group_id,table_id,role
) VALUES (
(SELECT device_id FROM registrations
WHERE mesg_token = 'aa')
, 1, 2, 2);
SQL error near line 38: 1001: Insert
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( Kees Nuyt
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h a decent C++ compiler,
there are good C++ wrappers. So, there is a choice for
application development.
>I just read the Linus Torvalds comment on the C++ for Git
>What do you think?
>
>Cheers,
>Sylvain
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( Kees Nuyt
)
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ime')
> WHERE rowid = new.rowid;
>END;
>
>
> it ticked another update trigger. I found workaround by
> adding UPDATE OF clause for a specific field
>
>CREATE TRIGGER validate_players_update_role BEFORE UPDATE OF role ON players
>
>
>Now I even unde
>--- On Wed, 6/3/09, robinsmathew wrote:
>
>
>From: robinsmathew
>Subject: Re: [sqlite] how can we solve IF EXIST in SQLite
>To: sqlite-users@sqlite.org
>Date: Wednesday, June 3, 2009, 3:15 AM
>
>
>
>its showing an error near "if": syntax error
>
SELECT Count() in
>SQLite is not optimized.
It has recently been optimized, but only for the form:
SELECT count(*) FROM
without WHERE or LIMIT clauses.
http://www.sqlite.org/cvstrac/chngview?cn=6316
>For big result sets, I might want to just do
>one mongo select and then count the results in memory.
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same issue was discussed very recently in the
mailing list. You may want to consult the archives.
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rse you have to search the ticket database.
http://www.sqlite.org/cvstrac/search?t=1&c=1
Any problem ever reported is registered there.
>____
>From: Kees Nuyt
>To: sqlite-users@sqlite.org
>Sent: Tuesday, June 9, 2009 12:52:47 PM
>Subject: Re: [sqlit
ot;the tables behind" a view
with an INSTEAD OF trigger. The trigger can contain any
update statement you like.
http://www.sqlite.org/lang_createtrigger.html#instead_of_trigger
>Best regards.
>
>Frank
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( Kees Nuyt
)
c[_]
___
sqlite
&zErrMsg );
>
>How can i save the returned result-table in a C string for further use in
>the program?
Have a look at some sample code:
http://www.sqlite.org/cvstrac/wiki?p=SimpleCode
http://www.sqlite.org/cvstrac/wiki?p=SampleCode
>Thanks.
--
( Kees Nuyt
)
c[_]
___
key, which converts those
constraints into TRIGGERs that implement them.
http://www.sqlite.org/cvstrac/wiki?p=ForeignKeyTriggers
There's also a site that implements it:
http://www.rcs-comp.com/site/index.php/view/Utilities-SQLite_foreign_key_trigger_generator
>Simon.
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( Kees Nuyt
number of INSERTs per transaction
- The schema: INDEX PRIMARY KEY on the first column
instead of a non-unique index
(if the application allows it)
- load the database in order of index(es)
Especially a non-unique index with low cardinality has a lot
of overhead.
>JP
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( Kees Nuyt
)
c
our system has multiple
processor cores, and if the databases are each on a
different disk.
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atabase
browsers for SQLite databases though, with an editable grid.
I use Sqlite3explorer, SqliteSpy and SqliteManager. The last
one is a Firefox add-on.
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On Sun, 21 Jun 2009 12:44:51 -0700, Kelly Jones
wrote:
>On 6/21/09, Kees Nuyt wrote:
>> On Sun, 21 Jun 2009 10:01:22 -0700, Kelly Jones
>> wrote:
>>
>>>Emacs' "forms mode" lets you edit a text file as though each line were
>>>a database rec
27;s a good idea, for at least two reasons:
- opening a connection has to parse the schema,
and though it's fast code, it should be avoided.
- the contents of the page cache aren't wasted,
it may be re-used by subsequent statements.
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( Kees Nuyt
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