Meaning of Primary Key to Microsoft SQL Server 2008
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Published on 2010-02-14T22:02:14Z
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2010/05/02
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What meaning does the concept of a primary key have to the database engine of SQL Server? I don't mean the clustered/nonclustered index created on the "ID" column, i mean the constraint object "primary key". Does it matter if it exists or not?
Alternatives:
- alter table add primary key clustered
- alter table create clustered index
Does it make a difference?
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