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Open Source MongoDB Gets Commercial Support
http://www.databasejournal.com/features/article.php/3873406/Open-Source-MongoDB-Gets-Commercial-Support.htm
The Basics of SQL Joins in MySQL
,----[ Quote ]
| When making your first forays into relational
| database development, you can use simple SQL
| statements to mine your data easily enough.
| However, as your data grows in both size and
| breadth, you'll need to begin employing more
| sophisticated strategies for exploiting
| increasingly complex data relations. After
| all, pulling data from a single table is easy,
| but what if you need to query for data
| spanning three, four, or even eight different
| tables?
`----
http://www.developer.com/features/article.php/3873466/The-Basics-of-SQL-Joins-in-MySQL.htm
7 performance tips for faster SQL queries
http://news.yahoo.com/s/infoworld/20100331/tc_infoworld/116262
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