Pete FreitagMultiple Dynamic Inserts with SQL
August 30, 2005
If you have ever had to do lots of SQL INSERT statements you will know that they can get pretty slow. When looking for ways to speed up some inserts, I noticed that you can use a SELECT subquery to provide the values. Like this:
INSERT INTO foo_archive (id, title) SELECT id, title FROM foo
This should work on Microsoft SQL Server, MySQL, PostgreSQL, and Oracle.
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Comments
I've done these types of inserts on IBM's DB2 also. It's a great trick when normalizing poorly designed tables, or to force a reorder when adding indices to a table.
I WANT TO INSERT 100 RECORDS AT A TIME ..HOW CAN I BUILD THIS QUERY??
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