在截断表之前，必须删除所有外键。使用此脚本生成最终脚本，以删除和重新创建数据库中的所有外键。请将@action变量设置为“CREATE”或“DROP”。

这是数据库擦除脚本之王。它将清除所有表并正确地重新播种:

SET QUOTED_IDENTIFIER ON;
EXEC sp_MSforeachtable 'SET QUOTED_IDENTIFIER ON; ALTER TABLE ? NOCHECK CONSTRAINT ALL'  
EXEC sp_MSforeachtable 'SET QUOTED_IDENTIFIER ON; ALTER TABLE ? DISABLE TRIGGER ALL'  
EXEC sp_MSforeachtable 'SET QUOTED_IDENTIFIER ON; DELETE FROM ?'  
EXEC sp_MSforeachtable 'SET QUOTED_IDENTIFIER ON; ALTER TABLE ? CHECK CONSTRAINT ALL'  
EXEC sp_MSforeachtable 'SET QUOTED_IDENTIFIER ON; ALTER TABLE ? ENABLE TRIGGER ALL' 
EXEC sp_MSforeachtable 'SET QUOTED_IDENTIFIER ON';

IF NOT EXISTS (
    SELECT
        *
    FROM
        SYS.IDENTITY_COLUMNS
        JOIN SYS.TABLES ON SYS.IDENTITY_COLUMNS.Object_ID = SYS.TABLES.Object_ID
    WHERE
        SYS.TABLES.Object_ID = OBJECT_ID('?') AND SYS.IDENTITY_COLUMNS.Last_Value IS NULL
)
AND OBJECTPROPERTY( OBJECT_ID('?'), 'TableHasIdentity' ) = 1

    DBCC CHECKIDENT ('?', RESEED, 0) WITH NO_INFOMSGS;

享受吧，但要小心!

select 'delete from ' +TABLE_NAME from INFORMATION_SCHEMATABLE_TYPE='BASE TABLE'的表

结果就在那里。

在查询窗口复制粘贴并运行命令

用脚本删除数据库要容易得多(甚至可能更快)，然后直接从脚本中删除并创建数据库。

运行一次注释掉的部分，用希望截断的表填充_TruncateList表，然后运行脚本的其余部分。如果您经常这样做，_ScriptLog表将需要随着时间的推移被清理。

如果你想做所有的表，你可以修改这个，只要把SELECT name放入#TruncateList FROM sys.tables。然而，你通常不想做所有的事情。

此外，这将影响数据库中的所有外键，如果它对您的应用程序太生硬，您也可以修改它。这不是我的目的。

/*
CREATE TABLE _ScriptLog 
(
    ID Int NOT NULL Identity(1,1)
    , DateAdded DateTime2 NOT NULL DEFAULT GetDate()
    , Script NVarChar(4000) NOT NULL
)

CREATE UNIQUE CLUSTERED INDEX IX_ScriptLog_DateAdded_ID_U_C ON _ScriptLog
(
    DateAdded
    , ID
)

CREATE TABLE _TruncateList
(
    TableName SysName PRIMARY KEY
)
*/
IF OBJECT_ID('TempDB..#DropFK') IS NOT NULL BEGIN
    DROP TABLE #DropFK
END

IF OBJECT_ID('TempDB..#TruncateList') IS NOT NULL BEGIN
    DROP TABLE #TruncateList
END

IF OBJECT_ID('TempDB..#CreateFK') IS NOT NULL BEGIN
    DROP TABLE #CreateFK
END

SELECT Scripts = 'ALTER TABLE ' + '[' + OBJECT_NAME(f.parent_object_id)+ ']'+
' DROP  CONSTRAINT ' + '[' + f.name  + ']'
INTO #DropFK
FROM .sys.foreign_keys AS f
INNER JOIN .sys.foreign_key_columns AS fc
ON f.OBJECT_ID = fc.constraint_object_id

SELECT TableName
INTO #TruncateList
FROM _TruncateList

SELECT Scripts = 'ALTER TABLE ' + const.parent_obj + '
    ADD CONSTRAINT ' + const.const_name + ' FOREIGN KEY (
            ' + const.parent_col_csv + '
            ) REFERENCES ' + const.ref_obj + '(' + const.ref_col_csv + ')
'
INTO #CreateFK
FROM (
    SELECT QUOTENAME(fk.NAME) AS [const_name]
        ,QUOTENAME(schParent.NAME) + '.' + QUOTENAME(OBJECT_name(fkc.parent_object_id)) AS [parent_obj]
        ,STUFF((
                SELECT ',' + QUOTENAME(COL_NAME(fcP.parent_object_id, fcp.parent_column_id))
                FROM sys.foreign_key_columns AS fcP
                WHERE fcp.constraint_object_id = fk.object_id
                FOR XML path('')
                ), 1, 1, '') AS [parent_col_csv]
        ,QUOTENAME(schRef.NAME) + '.' + QUOTENAME(OBJECT_NAME(fkc.referenced_object_id)) AS [ref_obj]
        ,STUFF((
                SELECT ',' + QUOTENAME(COL_NAME(fcR.referenced_object_id, fcR.referenced_column_id))
                FROM sys.foreign_key_columns AS fcR
                WHERE fcR.constraint_object_id = fk.object_id
                FOR XML path('')
                ), 1, 1, '') AS [ref_col_csv]
    FROM sys.foreign_key_columns AS fkc
    INNER JOIN sys.foreign_keys AS fk ON fk.object_id = fkc.constraint_object_id
    INNER JOIN sys.objects AS oParent ON oParent.object_id = fkc.parent_object_id
    INNER JOIN sys.schemas AS schParent ON schParent.schema_id = oParent.schema_id
    INNER JOIN sys.objects AS oRef ON oRef.object_id = fkc.referenced_object_id
    INNER JOIN sys.schemas AS schRef ON schRef.schema_id = oRef.schema_id
    GROUP BY fkc.parent_object_id
        ,fkc.referenced_object_id
        ,fk.NAME
        ,fk.object_id
        ,schParent.NAME
        ,schRef.NAME
    ) AS const
ORDER BY const.const_name

INSERT INTO _ScriptLog (Script)
SELECT Scripts
FROM #CreateFK

DECLARE @Cmd NVarChar(4000)
    , @TableName SysName

WHILE 0 < (SELECT Count(1) FROM #DropFK) BEGIN
    SELECT TOP 1 @Cmd = Scripts 
    FROM #DropFK

    EXEC (@Cmd)

    DELETE #DropFK WHERE Scripts = @Cmd
END

WHILE 0 < (SELECT Count(1) FROM #TruncateList) BEGIN
    SELECT TOP 1 @Cmd = N'TRUNCATE TABLE ' +  TableName
        , @TableName = TableName
    FROM #TruncateList

    EXEC (@Cmd)

    DELETE #TruncateList WHERE TableName = @TableName
END

WHILE 0 < (SELECT Count(1) FROM #CreateFK) BEGIN
    SELECT TOP 1 @Cmd = Scripts 
    FROM #CreateFK

    EXEC (@Cmd)

    DELETE #CreateFK WHERE Scripts = @Cmd
END

这是一种方法……可能还有其他10种更好/更有效的方法，但这听起来似乎很少有人这样做，所以下面是……

从sysobjects中获取一个表列表，然后用游标遍历这些表，为每次迭代调用sp_execsql('truncate table ' + @table_name)。