How to: Delete an Index (SQL Server Management Studio)
This topic describes how to delete an index by using Object Explorer in SQL Server Management Studio.
Indexes created as the result of a PRIMARY KEY or UNIQUE constraint cannot be deleted by using this method. Instead, the constraint must be deleted.
To delete an index
In Object Explorer, connect to an instance of SQL Server and then expand that instance.
Expand Databases, expand the database in which the table belongs, and then expand Tables.
Expand the table in which the index belongs and then expand Indexes.
Right-click the index to be deleted and then click Delete.
Confirm the correct index is selected and then click OK.