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9.2

Delete all contraints in a database

Asked by ksfok in MS SQL Server

Tags: all, drop, constraints, database, contraints

Given this script to delete all contrants in a SQL 2005 database:

-- Make sure we are on the correct db

USE [TD_Backup]
GO
--- Do not show record counts

SET NOCOUNT ON

--- Declare variables to be use in script

DECLARE      @ObjectID      INT
,            @ObjectName VARCHAR(500)
,            @SQL            NVARCHAR(2000)
,            @Count            INT
,            @ObjectType      VARCHAR(1000)

--- Create temp table that is going to be used throughout the script

CREATE TABLE #ObjectTemp (ObjectID INT IDENTITY(1,1) NOT NULL, ObjectName VARCHAR(250), ObjectType VARCHAR(100))
SET @Count = 0

--- First let's drop all the constraints on the tables
------ CAUTION:  Running this part removes all constraints from the database -------

INSERT INTO #ObjectTemp (ObjectName, ObjectType)
SELECT Table_Schema + '.' + Table_Name, Constraint_Name
FROM INFORMATION_SCHEMA.Table_CONSTRAINTS
ORDER BY constraint_type , Table_Name

SELECT @ObjectID = MIN(ObjectID) FROM #ObjectTemp

WHILE @ObjectID IS NOT NULL
BEGIN

SELECT      @ObjectName = ObjectName
,      @ObjectType = ObjectType
FROM #ObjectTemp WHERE ObjectID = @ObjectID

SET @SQL = 'ALTER TABLE ' + @ObjectName + ' DROP CONSTRAINT [' + @ObjectType + ']'

EXECUTE SP_EXECUTESQL @SQL

SELECT @ObjectID = MIN(ObjectID) FROM #ObjectTemp WHERE ObjectID > @ObjectID
SET @ObjectName = NULL
SET @SQL = NULL
SET @COUNT = @Count + 1

END
PRINT CAST(@Count AS VARCHAR(10)) + ' Constraint(s) deleted'ill

Will the above script work for a SQL2000 database?
[+][-]11/04/07 07:53 PM, ID: 20213746Accepted Solution

Your question has an Asker Certified™ answer! ksfok verified that this solution worked for them--which means it will likely work for you, too. Click to view the solution free for 30-days now.

About this solution

Zone: MS SQL Server
Tags: all, drop, constraints, database, contraints
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Solution Provided By: aneeshattingal
Participating Experts: 1
Solution Grade: B
 
 
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