Hello --
I'm trying to track down a segfault that happens when I'm using
DBD::SQLite for Perl, and I'm confused by the documentation for
sqlite3_column_decltype(). I think I understand what it does, but
I think there are some typos that make me uncertain:
This is definitely the fastest way, if it succeeds. If its performed via
SQLite DDL then it does the appropriate locking on the file etc and returns
nice error codes.
By doing it via the file system (at least on linux), other readers of the
file will continue to read from it... I don't know if
On Feb 9, 2006, at 23:02, Marian Olteanu wrote:
I would say that the fastest way (CPU cycles and lines of code) to
delete all tables would be to delete the file in which the database
is stored.
Clever!
On 2/9/06, Cyrille37 <[EMAIL PROTECTED]> wrote:
> Jay Sprenkle a écrit :
> >> Thanks Jay,
> >>
> >> the "not in" was the syntax I didn't know for adding the select query to
> >> the delete command.
I haven't found the not in to be slow, but I haven't tried it on sqlite.
In all the other systems
I would say that the fastest way (CPU cycles and lines of code) to delete
all tables would be to delete the file in which the database is stored.
On Thu, 9 Feb 2006, Xavier Noria wrote:
In the schema definition I would like to avoid the combo
delete if exists table_name;
create
In the schema definition I would like to avoid the combo
delete if exists table_name;
create table_name ( ... );
Can I query sqlite_master about tables, indexes, etc. in a way that
allows the deletion of everything in one shot beforehand?
-- fxn
Igor Tandetnik wrote:
Eugen Stoianovici wrote:
Is there a way of reading the names of the columns in a table? how
about the table names in a data base?
select * from sqlite_master where type='table'
pragma table_info(table_name);
Igor Tandetnik
Thanks
Jay Sprenkle a écrit :
Thanks Jay,
the "not in" was the syntax I didn't know for adding the select query to
the delete command.
You're welcome. You can also do it with a join but it's not as clear and simple.
Perhaps the "Join" version is faster than "Not In" ??
I read that "not" usually
select name from sqlite_master where type='table'
That will get you the names of tables in the database.
-Original Message-
From: Eugen Stoianovici [mailto:[EMAIL PROTECTED]
Sent: Thursday, February 09, 2006 3:57 PM
To: sqlite-users@sqlite.org
Subject: [sqlite] How to read column names
Eugen Stoianovici wrote:
Is there a way of reading the names of the columns in a table? how
about the table names in a data base?
Eugen,
This will give you the table names:
select name from sqlite_master where type = 'table';
and this will give you the columns in that table:
pragam
Eugen Stoianovici wrote:
Is there a way of reading the names of the columns in a table? how
about the table names in a data base?
select * from sqlite_master where type='table'
pragma table_info(table_name);
Igor Tandetnik
Is there a way of reading the names of the columns in a table? how about
the table names in a data base?
> Thanks Jay,
>
> the "not in" was the syntax I didn't know for adding the select query to
> the delete command.
>
You're welcome. You can also do it with a join but it's not as clear and simple.
Jay Sprenkle a écrit :
How about this:
delete from Words
where IID not in ( select Words_IID from Feedbacks_has_Words )
Thanks Jay,
the "not in" was the syntax I didn't know for adding the select query to
the delete command.
Thank you.
cyrille
Jay Sprenkle a écrit :
How about this:
delete from Words
where IID not in ( select Words_IID from Feedbacks_has_Words )
Thanks Jay,
the "not in" was the syntax I didn't know for adding the select query to
the delete command.
Thank you.
cyrille
Radu Lodina a écrit :
Hi cyrille,
Please try:
DELETE FROM Words WHERE IID NOT IN
( SELECT Words_ID FROM Feedbacks_has_Words )
YEAH!!! Thanks a lot.
Your answer was so fast that I could not believe.
Surely I'm dreaming ...
;o)
thanks again.
cyrille
Regards
Radu Lodina
On 2/9/06,
On 2/9/06, Cyrille37 <[EMAIL PROTECTED]> wrote:
> Hello,
>
> I've got a SELECT query that I would like to transform as a DELETE query ,
> but I could not write that DELETE query ;o{
>
> Here is the case :
>
> In a search engine, I would like to erase all words that are no more
> attached to a
Hi cyrille,
Please try:
DELETE FROM Words WHERE IID NOT IN
( SELECT Words_ID FROM Feedbacks_has_Words )
Regards
Radu Lodina
On 2/9/06, Cyrille37 <[EMAIL PROTECTED]> wrote:
>
> Hello,
>
> I've got a SELECT query that I would like to transform as a DELETE query ,
> but I could not write that
Hello,
I've got a SELECT query that I would like to transform as a DELETE query ,
but I could not write that DELETE query ;o{
Here is the case :
In a search engine, I would like to erase all words that are no more
attached to a feedback entry.
table Words ( IID, Word )
table
> >> >program). But this didn't work. So I wrote a simple print method that
> >> >takes
> >> >one argument and printf it to the standard out. This works and actually
> >> >solves my problem.
> >> There isn't a way to get this output printed directly, but you can
> >> easily create a log of your
"Jim C. Nasby" <[EMAIL PROTECTED]> writes:
> On Thu, Feb 09, 2006 at 09:51:44AM -0700, Dennis Cote wrote:
>> >program). But this didn't work. So I wrote a simple print method that takes
>> >one argument and printf it to the standard out. This works and actually
>> >solves my problem.
>> There
On Thu, Feb 09, 2006 at 09:51:44AM -0700, Dennis Cote wrote:
> >program). But this didn't work. So I wrote a simple print method that takes
> >one argument and printf it to the standard out. This works and actually
> >solves my problem.
> There isn't a way to get this output printed directly, but
Ran wrote:
Hi all,
I use many triggers and for debugging purposes I wanted to know which one is
triggered and when.
At first I thought that if I write a SELECT within the BEGIN-END block, this
SELECT results will be printed (at least when using sqlite3 command line
program). But this didn't
[EMAIL PROTECTED] wrote:
Ticket #1662 (http://www.sqlite.org/cvstrac/tktview?tn=1662)
complains that SQLite is not converting strings into numbers
if the string contains leading spaces. This happens because
SQLite just hands the string to strtod() and strtod() does not
recognize numbers with
Hi all,
I use many triggers and for debugging purposes I wanted to know which one is
triggered and when.
At first I thought that if I write a SELECT within the BEGIN-END block, this
SELECT results will be printed (at least when using sqlite3 command line
program). But this didn't work. So I wrote
Using the LIKE qualifier instead of = will result in case insensitive
matches.
Shawn M. Downey
MPR Associates
10 Maxwell Drive, Suite 204
Clifton Park, NY 12065
518-371-3983 x113 (work)
860-508-5015 (cell)
-Original Message-
From: manoj marathayil [mailto:[EMAIL PROTECTED]
Sent:
[EMAIL PROTECTED] a écrit :
So the question is: should this be changed. Should SQLite
ignore leading space in strings when trying to determine if
the string looks like a number.
[...]
Which is the correct behavior? Is this important enough to
change (and possible cause problems in legacy
Sybase ASE 12.5.3:
3 3.33
Regards,
Jarek
> -Wiadomość oryginalna-
> Od: Dennis Cote [mailto:[EMAIL PROTECTED]
> Wysłano: 8 lutego 2006 20:11
> Do: sqlite-users
> Temat: [sqlite] testing Avg() function in other database engines
>
> Hi All,
>
> I have a question that I
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