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Posted by Alexander Kuznetsov on 10/02/41 11:51
an excerpt from BOL:
"C. Using UNIQUE constraints
UNIQUE constraints are used to enforce uniqueness on nonprimary key
columns. The following example enforces a restriction that the Name
column of the Product table must be unique.
Copy Code
Name nvarchar(100) NOT NULL
UNIQUE NONCLUSTERED
"
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