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RAHINA.V.V
BCA Faculty
1 Answer(s)      2 years and 6 months ago
Posted in : JDBC


what is mean by primary key? please give me a detailed explanation with example...


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January 31, 2012 at 3:16 PM


A primary key is one which uniquely identifies a row of a table. A table can contain only one PRIMARY KEY.It does not allow null values and also does not allow duplicate values.

Have a look at the following link:

http://www.roseindia.net/sql/sql-primary-key-constraint.shtml



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