Re: distinct clause issue for 600000 records
Posted by:
Ra Nala
Date: November 12, 2015 07:18AM
yes you are correct indexes on id columns, performance should not be an issue.
and i can write sub select Sir, but here i given my sample query as small one but actually query having lot of LEFT joins.
In this case i should not go for "sub select" why because i need to retrieve millions of records may be nearly 600000 to 5000000 records.
I am using ETL tool as Pentaho data integration that is not able to load 5000000 records at the same time. unable to process in temp table due to this reason i missing records.
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Re: distinct clause issue for 600000 records
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