to Create A Unique Constraint
In Object Explorer, right-click the table to which you want to add a unique constraint, and select Design.
to Create A Unique Constraint on An Existing Table
In Object Explorer, connect to an instance of Database Engine.
What naming conventions are used in a unique constraint?
Naming conventions are important, and primary key and foreign key have commonly used and obvious conventions ( PK_Table and FK_Table_ReferencedTable, respectively). The IX_Table_Column naming for indexes is also fairly standard. What about the UNIQUE constraint? Is there a commonly accepted naming convention for this constraint?
How do I create a unique constraint in SQL Server?
Applies to: SQL Server 2016 (13.x) and later Azure SQL Database Azure SQL Managed Instance You can create a unique constraint in SQL Server by using SQL Server Management Studio or Transact-SQL to ensure no duplicate values are entered in specific columns that do not participate in a primary key.
Can a unique constraint be referenced by a FOREIGN KEY constraint?
A UNIQUE constraint can be referenced by a FOREIGN KEY constraint. When a UNIQUE constraint is added to an existing column or columns in the table, by default, the Database Engine examines the existing data in the columns to make sure all values are unique.
What is the difference between unique constraint and unique index?
And the only difference between a unique constraint and a unique index is INCLUDE columns. Edit: Feb 2013. Since SQL Server 2008, indexes can have filters too. Constraints can not
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Naming convention for unique constraint. Naming conventions are important, and primary key and foreign key have commonly used and obvious conventions ( PK_Table and FK_Table_ReferencedTable, respectively). The IX_Table_Column naming for indexes is also fairly standard. lgo algo-sr relsrch fst richAlgo" data-03d="645f7f8ac9328">stackoverflow.com › questions › 4836391sql - Naming convention for unique constraint - Stack Overflow stackoverflow.com › questions › 4836391 Cached