Drop all the tables, stored procedures, triggers, constraints and all the dependencies in one sql statement

 In this article, I am explaining how to Drop all the tables, stored procedures, triggers, constraints, and all dependencies in one SQL statement.

/* Drop all non-system stored procs */

DECLARE @name VARCHAR(128)

DECLARE @SQL VARCHAR(254)

 

SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'P' AND category = 0 ORDER BY [name])

WHILE @name is not null

BEGIN

    SELECT @SQL = 'DROP PROCEDURE [dbo].[' + RTRIM(@name) +']'

    EXEC (@SQL)

    PRINT 'Dropped Procedure: ' + @name

    SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'P' AND category = 0 AND [name] > @name ORDER BY [name])

END

GO

 

/* Drop all views */

DECLARE @name VARCHAR(128)

DECLARE @SQL VARCHAR(254)

 

SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'V' AND category = 0 ORDER BY [name])

 

WHILE @name IS NOT NULL

BEGIN

    SELECT @SQL = 'DROP VIEW [dbo].[' + RTRIM(@name) +']'

    EXEC (@SQL)

    PRINT 'Dropped View: ' + @name

    SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'V' AND category = 0 AND [name] > @name ORDER BY [name])

END

GO

 

/* Drop all functions */

DECLARE @name VARCHAR(128)

DECLARE @SQL VARCHAR(254)

 

SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] IN (N'FN', N'IF', N'TF', N'FS', N'FT') AND category = 0 ORDER BY [name])

 

WHILE @name IS NOT NULL

BEGIN

    SELECT @SQL = 'DROP FUNCTION [dbo].[' + RTRIM(@name) +']'

    EXEC (@SQL)

    PRINT 'Dropped Function: ' + @name

    SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] IN (N'FN', N'IF', N'TF', N'FS', N'FT') AND category = 0 AND [name] > @name ORDER BY [name])

END

GO

 

/* Drop all Foreign Key constraints */

DECLARE @name VARCHAR(128)

DECLARE @constraint VARCHAR(254)

DECLARE @SQL VARCHAR(254)

 

SELECT @name = (SELECT TOP 1 TABLE_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'FOREIGN KEY' ORDER BY TABLE_NAME)

 

WHILE @name is not null

BEGIN

    SELECT @constraint = (SELECT TOP 1 CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'FOREIGN KEY' AND TABLE_NAME = @name ORDER BY CONSTRAINT_NAME)

    WHILE @constraint IS NOT NULL

    BEGIN

        SELECT @SQL = 'ALTER TABLE [dbo].[' + RTRIM(@name) +'] DROP CONSTRAINT [' + RTRIM(@constraint) +']'

        EXEC (@SQL)

        PRINT 'Dropped FK Constraint: ' + @constraint + ' on ' + @name

        SELECT @constraint = (SELECT TOP 1 CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'FOREIGN KEY' AND CONSTRAINT_NAME <> @constraint AND TABLE_NAME = @name ORDER BY CONSTRAINT_NAME)

    END

SELECT @name = (SELECT TOP 1 TABLE_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'FOREIGN KEY' ORDER BY TABLE_NAME)

END

GO

 

/* Drop all Primary Key constraints */

DECLARE @name VARCHAR(128)

DECLARE @constraint VARCHAR(254)

DECLARE @SQL VARCHAR(254)

 

SELECT @name = (SELECT TOP 1 TABLE_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'PRIMARY KEY' ORDER BY TABLE_NAME)

 

WHILE @name IS NOT NULL

BEGIN

    SELECT @constraint = (SELECT TOP 1 CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'PRIMARY KEY' AND TABLE_NAME = @name ORDER BY CONSTRAINT_NAME)

    WHILE @constraint is not null

    BEGIN

        SELECT @SQL = 'ALTER TABLE [dbo].[' + RTRIM(@name) +'] DROP CONSTRAINT [' + RTRIM(@constraint)+']'

        EXEC (@SQL)

        PRINT 'Dropped PK Constraint: ' + @constraint + ' on ' + @name

        SELECT @constraint = (SELECT TOP 1 CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'PRIMARY KEY' AND CONSTRAINT_NAME <> @constraint AND TABLE_NAME = @name ORDER BY CONSTRAINT_NAME)

    END

SELECT @name = (SELECT TOP 1 TABLE_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE constraint_catalog=DB_NAME() AND CONSTRAINT_TYPE = 'PRIMARY KEY' ORDER BY TABLE_NAME)

END

GO

 

/* Drop all tables */

DECLARE @name VARCHAR(128)

DECLARE @SQL VARCHAR(254)

 

SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'U' AND category = 0 ORDER BY [name])

 

WHILE @name IS NOT NULL

BEGIN

    SELECT @SQL = 'DROP TABLE [dbo].[' + RTRIM(@name) +']'

    EXEC (@SQL)

    PRINT 'Dropped Table: ' + @name

    SELECT @name = (SELECT TOP 1 [name] FROM sysobjects WHERE [type] = 'U' AND category = 0 AND [name] > @name ORDER BY [name])

END

GO

 Ref-https://stackoverflow.com/questions/536350/drop-all-the-tables-stored-procedures-triggers-constraints-and-all-the-depend