Hi,
Yes, You are right. How SQLite will know the position of the row 990
unless it ordered by indexed field.
That takes me to another point, How SQLite exactly interpret the query, I
read in the documentation "After the parser assembles tokens into complete
SQL statements, it calls the code
I think method 3 shows the best promise:
Obviously M4 is out since it is in memory only. Besides caching should help
improve the performance.
The qustion that begs to be asked is: What are your performance goals? And
what are your performance numbers ie timings for each of the
=/
Well... that was just to confirm that there's no way to make those
queries work...
As we say, hope is the last to die...
Thanks a lot for your attention.
Bruno
On 8/17/07, Joe Wilson <[EMAIL PROTECTED]> wrote:
> Given that this issue has existed for years, and many simple workarounds
> are
On 19/08/2007 4:01 AM, Jef Driesen wrote:
Suppose I have two related tables:
CREATE TABLE events (
id INTEGER PRIMARY KEY NOT NULL,
place_id INTEGER
);
CREATE TABLE places (
id INTEGER PRIMARY KEY NOT NULL,
name TEXT
);
INSERT INTO places (id, name) VALUES (1, 'Place A');
Jef Driesen <[EMAIL PROTECTED]> wrote:
Is there a difference between using a primary key or another index
for a join?
There is a slight difference. When SQLite looks up by ROWID (which
INTEGER PRIMARY KEY column maps to) it jumps directly to the record, and
has all the fields in it easily
use sqlite statements.
regards
ragha
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--- Mina R Waheeb <[EMAIL PROTECTED]> wrote:
> Do you mean the LIMIT in SQLite is not optimized? and the performance
> of selecting from table contains 1000 rows match the query condation
> equal selecting the same condation with limit 990,10?
Pretty much, yes, as it should be.
LIMIT is
Conventional usage is as follows:
... WHERE column-name LIKE "string"
Which, of course, selects rows where the values in the named column
match the string, which can, and usually does, have wildcards.
I have been using an inverted arrangement:
... WHERE "string" LIKE column-name
This
On 8/18/07, Mina R Waheeb <[EMAIL PROTECTED]> wrote:
> Hi,
> Thanks for reply. I'm still confused about that. I don't know much
> about SQLite internals, But what i understanded from your reply that
> SQLite fetch any row match the query condation and then apply to it
> the GROUP BY then apply
OK, I understand. Must have miss read teh docs..
thanks,
Scott
Trevor Talbot wrote:
On 8/17/07, Scott Derrick <[EMAIL PROTECTED]> wrote:
exec a "BEGIN IMMEDIATE", with a sleep loop if I can't acquire the
reserved lock.
Then prepare, step, finalize, exit the function
When I come back
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