Kashmira Patel wrote:

> So I would have to put in lots of rows of data in the table 
> before using the explain command? 

No, but PostgreSQL's query planner may take a different approach for a small 
table than a large one.  The statistics used are generated during VACUUM 
ANALYZE/VACUUM FULL operations and, under 8.1, are probably maintained by 
autovacuum, but you can always vacuum manually and see if that changes the 
query plan.

-Owen

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