2008/08/10

SQL for Data Manipulation

Manipulation
• SQL allows a user or an application program to update the database by adding new data, removing old data, and modifying previously stored data.
Retrieval
• SQL allows a user or an application program to retrieve stored data from the database and use it.
Most Commonly Used Commands
SELECT INSERT
UPDATE DELETE

 High-level Language for data manipulation
 It does not require predefined navigation path
 It does not require knowledge of any key items
 It is uniform language for end-users and programmers
 It operates on one or more tables based on set theory, not on a record at a time.
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