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 add primary key on existing table		  New Topic  Reply to Topic
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sagar kumar singh
Starting Member

India
1 Posts
Posted - 09/26/2009 :  13:08:08  Show Profile  Reply with Quote
i have a table emp in my table eid have some duplicate data and now i want to add primary key on that column without cheeking previous data
is this possible help me____

SK SINGH

robvolk
Most Valuable Yak

USA
15559 Posts
Posted - 09/26/2009 :  16:37:35  Show Profile  Visit robvolk's Homepage  Reply with Quote
Since the primary key enforces uniqueness, you'll have to remove the duplicates otherwise it will fail.
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Nageswar9
Aged Yak Warrior

India
600 Posts
Posted - 09/30/2009 :  04:45:18  Show Profile  Reply with Quote
Hi,
if u dont have any duplicate value in particular column, then use this

Alter table table_name add constraint pk_tabl primary key (column)
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