: Unique : Table MySQL TUTORIALS
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MySQL TUTORIALS
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Table
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Unique
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49.1 .
ALTER TABLE table_name ADD UNIQUE index_name (column_name[,...]);
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49.2 .
Add Unique constaints to cover two columns
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49.3 .
You can create more than one unique key.
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49.4 .
Unique Keys
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![ALTER TABLE table_name ADD UNIQUE index_name (column_name[,...]);](res.png "ALTER TABLE table_name ADD UNIQUE index_name (column_name[,...]);"){kind=small}
ALTER TABLE table_name ADD UNIQUE index_name (column_name[,...]);
