Archives of the TeradataForum
Message Posted: Wed, 06 Aug 2003 @ 11:23:38 GMT
Subj: | | Re: Need help in understanding poor performance |
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From: | | Chris Coffing |
Since this is a temp table... You can create it as a Multi Set table instead of a SET table and it will run faster because it will not
have to check for duplication.
The problem that you run into when inserting millions of rows into a SET table is... as it gets bigger, there are more rows to recheck
for duplicates.
If you find that you must create the temp table as a SET table and it starts as and empty table, then you can load it using a
FastLoad.
Insert/Select is a great way to insert data into tables but can be very slow if you have large data volumes.
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