Answers for "drop unique constraint sql server"

how to drop a unique constraint in sql

SHOW CREATE TABLE [tableName]
-- Find the constraintID after CONSTRAINT 'constraintID'
ALTER TABLE [tableName] DROP FOREIGN KEY constraintID

drop unique key constraint in sql server

/* To Drop Unique Key Constraint*/
ALTER TABLE Table_Name
DROP CONSTRAINT Constraint_Name

remove unique key from a table

example: alter table DropIndex drop index BookId ;