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how we can use multiple primary key in single table

Posted 16-Feb-14 19:47pm

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Siva Hyderabad · Answer 1 · 2014-02-16T19:51:00

You can have a Composite Primary Key which is a primary key made from two or more columns. For example:

CREATE TABLE userdata (
userid integer,
userdataid integer,
info char(200),
primary key (userid, userdataid)
);

refer this link..

http://weblogs.sqlteam.com/jeffs/archive/2007/08/23/composite_primary_keys.aspx[^]