Apagar todos os dados na base de dados do servidor SQL

Normalmente usarei o proc sp_MSForEachTable não documentado

-- disable referential integrity
EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL' 
GO 

EXEC sp_MSForEachTable 'TRUNCATE TABLE ?' 
GO 

-- enable referential integrity again 
EXEC sp_MSForEachTable 'ALTER TABLE ? CHECK CONSTRAINT ALL' 
GO

Ver também: Apagar todos os dados na base de dados (quando tiver FKs)

/* 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

Para programar uma base de dados inteira, em SSMS, carregue com o botão direito na base de dados e seleccione TASKS -> Generate scripts:

Carregue em Next para saltar o ecrã de abertura do assistente e, em seguida, seleccione os objectos que deseja programar:

No ecrã Set scripting options, poderá escolher a configuração da programação, como se deseja gerar 1 programa para todos os objectos, ou scripts separados para os objectos individuais, e se deseja gravar o ficheiro em Unicode ou ANSI:

O assistente irá mostrar um resumo, que poderá usar para verificar se tudo está como desejado, e fechar carregando em 'Terminar'.

Geralmente é muito mais rápido programar todos os objetos no banco de dados, e criar um vazio, que para excluir ou truncar tabelas.

1. Primeiro, tens de desactivar todos os gatilhos.

   sp_msforeachtable 'ALTER TABLE ? DISABLE TRIGGER all';
   

2. Execute este programa: (tirado deste post Obrigado @SQLMenace)

   SET NOCOUNT ON
   GO
   
   SELECT 'USE [' + db_name() +']';
   ;WITH a AS 
   (
        SELECT 0 AS lvl, 
               t.object_id AS tblID 
        FROM sys.TABLES t
        WHERE t.is_ms_shipped = 0
          AND t.object_id NOT IN (SELECT f.referenced_object_id 
                                  FROM sys.foreign_keys f)
   
        UNION ALL
   
        SELECT a.lvl + 1 AS lvl, 
               f.referenced_object_id AS tblId
        FROM a
        INNER JOIN sys.foreign_keys f ON a.tblId = f.parent_object_id 
                                      AND a.tblID <> f.referenced_object_id
   )
   SELECT 
       'Delete from ['+ object_schema_name(tblID) + '].[' + object_name(tblId) + ']' 
   FROM a
   GROUP BY tblId 
   ORDER BY MAX(lvl),1
   

Este script irá produzir DELETE declarações em ordem adequada. começando pelas tabelas referenciadas, em seguida, referenciando as que

1. Copie as declarações DELETE FROM e execute - as Uma vez.

2. Activar os gatilhos

   sp_msforeachtable 'ALTER TABLE ? ENABLE TRIGGER all'
   

3. Persistir as alterações :

   begin transaction
   commit;
   

Abaixo de um programa que usei para remover todos os dados de uma base de dados do servidor SQL

------------------------------------------------------------
/* Use database */ 
-------------------------------------------------------------

use somedatabase;

GO

------------------------------------------------------------------
/* Script to delete an repopulate the base [init database] */
------------------------------------------------------------------

-------------------------------------------------------------
/* Procedure delete all constraints */ 
-------------------------------------------------------------

IF EXISTS (SELECT name  
           FROM  sysobjects 
           WHERE name = 'sp_DeleteAllConstraints' AND type = 'P')
    DROP PROCEDURE dbo.sp_DeleteAllConstraints
GO

CREATE PROCEDURE sp_DeleteAllConstraints
AS
    EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'
    EXEC sp_MSForEachTable 'ALTER TABLE ? DISABLE TRIGGER ALL'
GO

-----------------------------------------------------
/* Procedure delete all data from the database */ 
-----------------------------------------------------

IF EXISTS (SELECT name  
           FROM  sysobjects 
           WHERE name = 'sp_DeleteAllData' AND type = 'P')
    DROP PROCEDURE dbo.sp_DeleteAllData
GO

CREATE PROCEDURE sp_DeleteAllData
AS
    EXEC sp_MSForEachTable 'DELETE FROM ?'
GO

-----------------------------------------------
/* Procedure enable all constraints */ 
-----------------------------------------------

IF EXISTS (SELECT name  
           FROM  sysobjects 
           WHERE name = 'sp_EnableAllConstraints' AND type = 'P')
    DROP PROCEDURE dbo.sp_EnableAllConstraints
GO
-- ....
-- ....
-- ....

EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'

EXEC sp_MSForEachTable 'ALTER TABLE ? DISABLE TRIGGER ALL'

EXEC sp_MSForEachTable 'DELETE FROM ?'

EXEC sp_MSForEachTable 'ALTER TABLE ? CHECK CONSTRAINT ALL'

EXEC sp_MSForEachTable 'ALTER TABLE ? ENABLE TRIGGER ALL'

EXEC sp_MSFOREACHTABLE 'SELECT * FROM ?'

GO