How do I drop a constraint in SQL Server 2008?
In Object Explorer, expand the table with the check constraint. Expand Constraints. Right-click the constraint and click Delete. In the Delete Object dialog box, click OK.
How do I drop a constraint in SQL Server?
The SQL syntax to remove a constraint from a table is,
- ALTER TABLE “table_name” DROP [CONSTRAINT|INDEX] “CONSTRAINT_NAME”;
- ALTER TABLE Customer DROP INDEX Con_First;
- ALTER TABLE Customer DROP CONSTRAINT Con_First;
- ALTER TABLE Customer DROP CONSTRAINT Con_First;
How can I drop all constraints on a table in SQL Server?
Easy way is use sp_help tablename. All constraints will be listed. Then use ALTER TABLE DROP CONSTRAINT to drop them. Use EnterpriseManager to drop all constarints at once.
Can’t drop constraint See previous errors in SQL?
Description: This error message appears when you try to DROP a constraint, but this however was, due to an error, not successfully completed. Resolution: Error of the Severity Level 15 are generated by the user and can be fixed by the SQL Server user.
How do I drop primary key in SQL Server?
The primary key in SQL can be dropped by using the ALTER TABLE command with DROP PRIMARY KEY keyword in MySQL and DROP CONSTRAINT keyword in SQL Server or Oracle databases.
How do I remove primary key in SQL?
Using SQL Server Management Studio. To delete a primary key constraint using Object Explorer. In Object Explorer, expand the table that contains the primary key and then expand Keys. Right-click the key and select Delete. In the Delete Object dialog box, verify the correct key is specified and click OK.
What is unique key in SQL Server?
Unique Key in SQL. A unique key is a set of one or more than one fields/columns of a table that uniquely identify a record in a database table. You can say that it is little like primary key but it can accept only one null value and it cannot have duplicate values. The unique key and primary key both provide a guarantee for uniqueness…