roboticus:

This sounds a good idea, but my sql statement just look like this: 

delete tbl_3 using a primary key
insert tbl_3
(
about 200 fields
)
select
tbl_1's about 100 fields
tbl_2's about 100 fields
)

[download]

it's easy to split the DELETE statements, but it looks not so easy to transfer the insert statements into a file using the bcp format. Querying and then insert maybe the root cause for the slowness.

And the script I am using just use Sybase::CTlib to apply the sql batchs to the Sybase server. And each of my file is a TRAN, containing 30k delete-then-insert sql statements.

Thanks very much for your advice, I think maybe I should try to ran the script parallelly to see if it can save some time.

In reply to Re^2: How can I improve the sql statements applying efficiency by littlehorse
in thread How can I improve the sql statements applying efficiency by littlehorse

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