drop-all-schemas.sql

/* USE [YOUR_DATABASE] */


DECLARE @schema VARCHAR(128)
SELECT @schema = (SELECT TOP 1 [name] FROM sys.schemas ORDER BY [name])

WHILE @schema is not null
BEGIN

    /* 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 [' + RTRIM(@schema) +'].[' + 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 [' + RTRIM(@schema) +'].[' + 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 [' + RTRIM(@schema) +'].[' + 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 [' + RTRIM(@schema) +'].[' + 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 [' + RTRIM(@schema) +'].[' + 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 [' + RTRIM(@schema) +'].[' + 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

    /* Drop current active schema */
    DECLARE @SQL VARCHAR(254)

    SELECT @SQL = 'DROP SCHEMA ' + RTRIM(@schema)
    EXEC (@SQL)
    PRINT 'Dropped Schema: ' + @schema

    /* Select new schema and repeat */
    SELECT @schema = (SELECT TOP 1 [name] FROM sys.schemas ORDER BY [name])

END
GO