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Friday, January 21, 2011

What is a join and List different types of joins

Joins are used in queries to explain how different tables are related. Joins also let you select data from a table depending upon data from another table.
Types of joins:
INNER JOINs,
OUTER JOINs,
CROSS JOINs.
OUTER JOINs are further classified as
LEFT OUTER JOINS,
RIGHT OUTER JOINS and
 FULL OUTER JOINS.

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