Re: Performance problem in sql ce

On Apr 21, 4:26 am, Gagan <Ga...@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Hi,
I am very disappointed with the sql queries performance in sql ce. In my
some queries i have inner joins on 9 tables some tables have more then 150000
records. Db size is around 15 MB. If i run that query with particular where
clause (ex RoomNo. = 100) then it gives result in 1 minute otherwise i wait
for 15 min. & i did not get results. However i am using proper indexing on
SARG still response time is not acceptable. I also tried by putting db on sd
card doesn't work.
Can any body help me to find out where i am wrong or the limitations of sql
ce queries.

150,000 records sounds a bit too much for mobile application to
handle. Couple that with joins on 9 tables, I wouldn't expect good
performance at all. Ginny's suggestion of denormalization is a good
one if you can afford to make the changes. Another approach might be
to avoid the joins as much as possible and go with programmatic joins
via the SqlCeResultSet. This approach will at least allow you to have
a bit more control over the performance bottlenecks.

- Jin
.

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