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Two table join not using indexes
Posted by: Yash Desai
Date: March 10, 2011 02:11PM

I am just not able to get the table indexes to use themselves in this table join :

explain select n.* from npi n,npi_taxonomy nt where n.NPI=nt.NPI_CODE;

Here is the output of explain that i am getting :

http://i.imgur.com/oqmIi.png

As you can see, it finds the key in possible_keys column but the key column is empty. Please help.

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Two table join not using indexes
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