Richard Broersma wrote:
On Sat, Mar 15, 2008 at 4:41 PM, mark <markkicks@xxxxxxxxx> wrote:
On Sat, Mar 15, 2008 at 4:37 PM, Richard Broersma <
richard.broersma@xxxxxxxxx> wrote:
On Sat, Mar 15, 2008 at 4:21 PM, mark <markkicks@xxxxxxxxx> wrote:
select * from users where session_key is not Null order by id offset
OFFSET limit 300
One solution is to retain the last ID from the previous scan:
SELECT *
FROM Users
WHERE session_key IS NOT NULL
AND id > your_last_id
LIMIT 300;
will this ensure that no row is repeated when i itereate over the table?
what are the rows ordered by?
thanks
Ya, sorry I forgot to include the order by.
SELECT *
FROM Users
WHERE session_key IS NOT NULL
AND id > your_last_id
ORDER BY id
LIMIT 300;
Yes there will not be any repeated rows sence you are using a order set
that who's ID are greated than the last set.
As there's an index on id would it be faster to transpose the WHERE
conditions?
WHERE id > your_last_id
AND session_key IS NOT NULL
I can't remember if the order of WHERE is significant.
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