From DWIKI

Contents 1 Documentation 1.1 JOIN 1.2 UNION 2 Links 3 Tutorials

Documentation

JOIN

• http://www.w3schools.com/Sql/sql_join.asp

UNION

• http://en.wikipedia.org/wiki/Union_(SQL)

Links

• MySQL
• postgresql

Tutorials

• SQL tutorial
• http://www.firstsql.com/tutor.htm