I would like to be able to accomplish the following but don't see any
support for inner joins on update queries.
update A
set Id = B.Id
from A inner join B
on A.Field1 = B.Field_Temp
where B.Price > 0
Is this possible? What is the syntax of this query please?
Dear both (Christian and Joe),
(I'm the original author of the first mail, I'm just using my "usual" mail,
now... :D ).
Thanks for the replies: both works fine: I have no problem in adding new
data to the DB, but the performance IS an issue.
I tested your solutions, and I got the data in 200ms,
Hi Rob!
Maybe standard windows feature memory-mapping-file can help you?
Regards
Xeepe Phone Solution Team
http://en.xeepe.com
-Original Message-
From: Rob Richardson [mailto:[EMAIL PROTECTED]
Sent: Friday, July 13, 2007 7:35 PM
To: sqlite-users@sqlite.org
Subject: [sqlite] Sharing
Andre du Plessis <[EMAIL PROTECTED]> wrote:
I would like to be able to accomplish the following but don't see any
support for inner joins on update queries.
update A
set Id = B.Id
from A inner join B
on A.Field1 = B.Field_Temp
where B.Price > 0
update A set Id = coalesce(
(select Id from B
That is an interesting one.
Where could I find documentation about coalesce?
RBS
-Original Message-
From: Igor Tandetnik [mailto:[EMAIL PROTECTED]
Sent: 16 July 2007 12:49
To: SQLite
Subject: [sqlite] Re: inner join
Andre du Plessis <[EMAIL PROTECTED]> wrote:
> I would like to be able
Hi all,
I have tried this question in the forum with no answer, so I decide to
give it a try here :)
I am using the "Using" statements in C# to handle the closing of SQLite
connection, transaction and command objects. I have this setup in
different places in my code (Generic methods returning
Guten Tag
Ich arbeite mit SQLite3 über ein Netzwerk.
Wenn 2 User zur gleichen Zeit arbeiten wird der
Zugriff auf die SQLite3-Datenbank sehr langsam.
Was mache ich falsch.
Bitte um Hilfe.
mfg
Huber Gerhard
[EMAIL PROTECTED]
Hi All,
Eg:
People table
| EmpID | Name|
21 Rajesh
22 raj
23 Rakesh
24 ramesh
Consider following query
SELECT Name
FROM People
ORDER BY Name ASC;
will result as
Rajesh
Rakesh
raj
ramesh
But where as I need the output to
The Id piece works great thanks! If I want to update 2 fields on table
A, the following syntax doesn't work as expected, as it updates all to
records to 'DONE'.
update A set Flag = 'DONE',
Id = coalesce(
(select Id from B
where A.Field1 = B.Field_Temp and B.Price > 0),
Id);
RB Smissaert <[EMAIL PROTECTED]>
wrote:
Where could I find documentation about coalesce?
http://sqlite.org/lang_expr.html
Near the bottom where all the built-in functions are described.
Igor Tandetnik
-
To
RB Smissaert wrote:
That is an interesting one.
Where could I find documentation about coalesce?
The basic description is to be found in the Core Functions section of:
http://sqlite.org/lang_expr.html
In a nutshell, the function returns the first non-null argument.
HTH,
Gerry
Huber Privat <[EMAIL PROTECTED]> wrote:
> Guten Tag
>
> Ich arbeite mit SQLite3 über ein Netzwerk.
>
> Wenn 2 User zur gleichen Zeit arbeiten wird der
> Zugriff auf die SQLite3-Datenbank sehr langsam.
>
> Was mache ich falsch.
> Bitte um Hilfe.
>
SQLite tends to not work well on a network
Bharath Booshan L <[EMAIL PROTECTED]> wrote:
>
> Consider following query
>
> SELECT Name
> FROM People
> ORDER BY Name ASC;
>
SELECT Name
FROM People
ORDER BY Name ASC COLLATE nocase;
The nocase collating sequence only works for US-ASCII
characters. If you need UTF-8 you will need
"Ahmed Sulaiman" <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> I have tried this question in the forum with no answer, so I decide to
> give it a try here :)
>
> I am using the "Using" statements in C# to handle the closing of SQLite
> connection, transaction and command objects. I have this setup
Andre du Plessis <[EMAIL PROTECTED]> wrote:
The Id piece works great thanks! If I want to update 2 fields on table
A, the following syntax doesn't work as expected, as it updates all to
records to 'DONE'.
update A set Flag = 'DONE',
Id = coalesce(
(select Id from B
where A.Field1 =
Bharath Booshan L
<[EMAIL PROTECTED]> wrote:
Consider following query
SELECT Name
FROM People
ORDER BY Name ASC;
will result as
Rajesh
Rakesh
raj
ramesh
But where as I need the output to be sorted alphabetically
irrespective of
its CASE as shown below.
ORDER BY Name COLLATE NOCASE ASC
Let's assume we're using this schema:
CREATE TABLE A(Id INTEGER PRIMARY KEY, Field1, Flag);
CREATE TABLE B(Id INTEGER PRIMARY KEY, Field_Temp, Price);
CREATE INDEX B2 on B(Field_Temp, Price);
CREATE INDEX A1 on A(Field1, Id);
You can extend Igor's pattern for more than 1 column:
explain
Thanks for that.
I looked there, but overlooked it.
RBS
> RB Smissaert <[EMAIL PROTECTED]>
> wrote:
>> Where could I find documentation about coalesce?
>
> http://sqlite.org/lang_expr.html
>
> Near the bottom where all the built-in functions are described.
>
> Igor Tandetnik
>
>
Rollback is automatic if no Commit is issued in SQLite.NET.
If you want custom logic, such as including additional exception
information, then use try/catch
BeginTransaction();
try {
..
Commit();
} catch(Exception ex) {
RollBack();
throw new Exception("An exception occurred and the
Why does the command:
Pragma locking_mode = EXCLUSIVE;
generate output of "exclusive"
where other pragmas such as
Pragma synchrous = off;
do not generate any output whatsoever?
Thanks,
Ken
Thanks for the reply. I have got the code for the binding and it
actually does roll back automatically in case of exceptions. :)
Ahmed
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Monday, July 16, 2007 12:14 PM
To: sqlite-users@sqlite.org
Subject: Re:
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> Sent: Monday, July 16, 2007 9:14 AM
> To: sqlite-users@sqlite.org
> Subject: Re: [sqlite] Does Transaction object roll back
> automatically on exceptions?
>
> "Ahmed Sulaiman" <[EMAIL PROTECTED]> wrote:
> > Hi
Hi all,
Is it necessary to run a "SELECT" command in between a transaction? I
have few places in my code where I have a command that reads some data
from a table, and I wonder if I should begin/commit a transaction? Is
there any performance issues if I did or didn't do that?
Regards
How about the various implementations to use SQLite in client server
environment (based on wiki):
http://www.it77.de/sqlite/sqlite.htm
http://www.oneledger.co.uk/sql4sockets.html
http://users.iol.it/irwin/
http://sqlitedbms.sourceforge.net/
Does anyone have any experience any of these? Pros and
If I am stepping through the results of a SELECT and want to UPDATE values in
the currently selected row prior to completion of the SELECT query, will this
work?
What if there is already a pending writer lock on the database from a different
thread?
Thanks.
Larry
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