SQL UNIQUE CONSTRAINT
This is the second of 6 videos I have created on SQL Server constraints.
The Unique constraint ensures that each row for a column has a different value; you cannot repeat the same values in a column if the Unique constraint is specified.
SQL constraints are rules specified on database tables and/or columns to restrict the data entered into a table.
If we set constraints on a table and any violation between the constraint and the data, the action is aborted.
This is important in a relational database because it ensures the data's accuracy and reliability in the table.
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