SQL

SQL (Structured Query Language) is a computer language aimed to store, manipulate, and query data stored in relational databases. The first incarnation of SQL appeared in 1974, when a group in IBM developed the first prototype of a relational database. The first commercial relational database was released by Relational Software (later becoming Oracle). Standards for SQL exist. However, the SQL that can be used on each one of the major RDBMS today is in different flavors.

SQL Tutorial - SQL Query Reference and Programming Examples

Thanks: Peteris Krumins , David Child , Bob Stein, VisiBone , Lars Pohlmann, Robert Plummer, Nauman Leghari , Atul Vaidya , Jesse Keys , Andréia Bohner , Amit Agrawalla, Forbes , Roman Ožana (Ozzy) , Adam Byrtek, Gareth J M Saunders , Eric Schultz , Anton Buckov, Kate Parsons , Julien L. Coder & Designer, Jude, Eva Vesper, UtOpIaH, Zork Zero, Cembo Obmec, Andrea Benazzo , Michael Goerz , Guy K.

Cheat Sheet : All Cheat Sheets in one page

Thanks: Peteris Krumins , David Child , Bob Stein, VisiBone , Lars Pohlmann, Robert Plummer, Nauman Leghari , Atul Vaidya , Jesse Keys , Andréia Bohner , Amit Agrawalla, Forbes , Roman Ožana (Ozzy) , Adam Byrtek, Gareth J M Saunders , Eric Schultz , Anton Buckov, Kate Parsons , Julien L. Coder & Designer, Jude, Eva Vesper, UtOpIaH, Zork Zero, Cembo Obmec, Andrea Benazzo , Michael Goerz , Guy K.

SQL Tutorial - SQL Query Reference and Programming Examples

Cheat Sheet : All Cheat Sheets in one page

Cheat Sheet : All Cheat Sheets in one page

MySQLTuner

MySQLTuner.pl