Hi Experts,
I am using the following query
update ABC set abc.col1=xyz.col1from abc,xyz where abc.col2=xyz.col2 and xyz.col1 in (select min(xyz.col1)from xyz group by col2)
The sub query will return 1.5 million records , over all this query is working on 1 million records and taking around 10 min is there any way we can optmize this query or any sugession on index that will improve the performance.
Any help in this is very much appericiate.