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This link recently saved by atomoil on November 09, 2012
"From time to time I see people asking "What do I index to join these tables efficiently?" Often, someone just gives them an answer without really explaining the basic theory behind how to index for joins. The purpose of this document is to describe the basic theory behind indexing for joins with MySQL, starting first with a very simple example that demonstrates the basic principle of MySQL joins, and then applying the principle to a more complex 4 table query."
This link recently saved by atomoil on January 06, 2012
How to use a Yii CGridView to display and filter it's relation data
This link recently saved by atomoil on November 21, 2011
This link recently saved by atomoil on February 14, 2011