如果您以任何频率执行此操作，甚至在时间表上，我绝对不会明确地使用DML语句。写入事务日志的成本非常高，将整个数据库设置为SIMPLE恢复模式以截断一个表是荒谬的。

最好的办法，不幸是艰苦或费力的办法。这是:

减少约束 截断表 重新创建约束

我这样做的过程包括以下步骤:

在SSMS中，右键单击有问题的表，并选择查看依赖项 记下引用的表格(如果有的话) 回到对象资源管理器，展开Keys节点并记下外键(如果有的话) 开始编写脚本(删除/截断/重新创建)

这种性质的脚本应该在begin tran和commit tran块中完成。

截断不适合我，删除+重新播种是最好的方法。 如果你们中的一些人需要遍历大量的表来执行delete + reseed，你可能会遇到一些没有标识列的表的问题，下面的代码在尝试重新播种之前检查标识列是否存在

EXEC ('DELETE FROM [schemaName].[tableName]')
IF EXISTS (Select * from sys.identity_columns where object_name(object_id) = 'tableName')
BEGIN
    EXEC ('DBCC CHECKIDENT ([schemaName.tableName], RESEED, 0)')
END

如果您以任何频率执行此操作，甚至在时间表上，我绝对不会明确地使用DML语句。写入事务日志的成本非常高，将整个数据库设置为SIMPLE恢复模式以截断一个表是荒谬的。

最好的办法，不幸是艰苦或费力的办法。这是:

减少约束 截断表 重新创建约束

我这样做的过程包括以下步骤:

在SSMS中，右键单击有问题的表，并选择查看依赖项 记下引用的表格(如果有的话) 回到对象资源管理器，展开Keys节点并记下外键(如果有的话) 开始编写脚本(删除/截断/重新创建)

这种性质的脚本应该在begin tran和commit tran块中完成。

你可以按照这个步骤来做， 通过重新播种表，可以删除表中的数据。

delete from table_name
dbcc checkident('table_name',reseed,0)

如果出现错误，则必须重新播种主表。

我刚刚发现，只要先禁用子表上的外键约束，就可以在父表上使用TRUNCATE表。 如。

子表上的外键约束child_par_ref引用PARENT_TABLE

ALTER TABLE CHILD_TABLE DISABLE CONSTRAINT child_par_ref;
TRUNCATE TABLE CHILD_TABLE;
TRUNCATE TABLE PARENT_TABLE;
ALTER TABLE CHILD_TABLE ENABLE CONSTRAINT child_par_ref;

这是我对这个问题的解决方案。我用它来改变PK，但想法是一样的。希望这将是有用的)

PRINT 'Script starts'

DECLARE @foreign_key_name varchar(255)
DECLARE @keycnt int
DECLARE @foreign_table varchar(255)
DECLARE @foreign_column_1 varchar(255)
DECLARE @foreign_column_2 varchar(255)
DECLARE @primary_table varchar(255)
DECLARE @primary_column_1 varchar(255)
DECLARE @primary_column_2 varchar(255)
DECLARE @TablN varchar(255)

-->> Type the primary table name
SET @TablN = ''
---------------------------------------------------------------------------------------    ------------------------------
--Here will be created the temporary table with all reference FKs
---------------------------------------------------------------------------------------------------------------------
PRINT 'Creating the temporary table'
select cast(f.name  as varchar(255)) as foreign_key_name
    , r.keycnt
    , cast(c.name as  varchar(255)) as foreign_table
    , cast(fc.name as varchar(255)) as  foreign_column_1
    , cast(fc2.name as varchar(255)) as foreign_column_2
    , cast(p.name as varchar(255)) as primary_table
    , cast(rc.name as varchar(255))  as primary_column_1
    , cast(rc2.name as varchar(255)) as  primary_column_2
    into #ConTab
    from sysobjects f
    inner join sysobjects c on  f.parent_obj = c.id 
    inner join sysreferences r on f.id =  r.constid
    inner join sysobjects p on r.rkeyid = p.id
    inner  join syscolumns rc on r.rkeyid = rc.id and r.rkey1 = rc.colid
    inner  join syscolumns fc on r.fkeyid = fc.id and r.fkey1 = fc.colid
    left join  syscolumns rc2 on r.rkeyid = rc2.id and r.rkey2 = rc.colid
    left join  syscolumns fc2 on r.fkeyid = fc2.id and r.fkey2 = fc.colid
    where f.type =  'F' and p.name = @TablN
 ORDER BY cast(p.name as varchar(255))
---------------------------------------------------------------------------------------------------------------------
--Cursor, below, will drop all reference FKs
---------------------------------------------------------------------------------------------------------------------
DECLARE @CURSOR CURSOR
/*Fill in cursor*/

PRINT 'Cursor 1 starting. All refernce FK will be droped'

SET @CURSOR  = CURSOR SCROLL
FOR
select foreign_key_name
    , keycnt
    , foreign_table
    , foreign_column_1
    , foreign_column_2
    , primary_table
    , primary_column_1
    , primary_column_2
    from #ConTab

OPEN @CURSOR

FETCH NEXT FROM @CURSOR INTO @foreign_key_name, @keycnt, @foreign_table,         @foreign_column_1, @foreign_column_2, 
                        @primary_table, @primary_column_1, @primary_column_2

WHILE @@FETCH_STATUS = 0
BEGIN

    EXEC ('ALTER TABLE ['+@foreign_table+'] DROP CONSTRAINT ['+@foreign_key_name+']')

FETCH NEXT FROM @CURSOR INTO @foreign_key_name, @keycnt, @foreign_table, @foreign_column_1, @foreign_column_2, 
                         @primary_table, @primary_column_1, @primary_column_2
END
CLOSE @CURSOR
PRINT 'Cursor 1 finished work'
---------------------------------------------------------------------------------------------------------------------
--Here you should provide the chainging script for the primary table
---------------------------------------------------------------------------------------------------------------------

PRINT 'Altering primary table begin'

TRUNCATE TABLE table_name

PRINT 'Altering finished'

---------------------------------------------------------------------------------------------------------------------
--Cursor, below, will add again all reference FKs
--------------------------------------------------------------------------------------------------------------------

PRINT 'Cursor 2 starting. All refernce FK will added'
SET @CURSOR  = CURSOR SCROLL
FOR
select foreign_key_name
    , keycnt
    , foreign_table
    , foreign_column_1
    , foreign_column_2
    , primary_table
    , primary_column_1
    , primary_column_2
    from #ConTab

OPEN @CURSOR

FETCH NEXT FROM @CURSOR INTO @foreign_key_name, @keycnt, @foreign_table, @foreign_column_1, @foreign_column_2, 
                         @primary_table, @primary_column_1, @primary_column_2

WHILE @@FETCH_STATUS = 0
BEGIN

    EXEC ('ALTER TABLE [' +@foreign_table+ '] WITH NOCHECK ADD  CONSTRAINT [' +@foreign_key_name+ '] FOREIGN KEY(['+@foreign_column_1+'])
        REFERENCES [' +@primary_table+'] (['+@primary_column_1+'])')

    EXEC ('ALTER TABLE [' +@foreign_table+ '] CHECK CONSTRAINT [' +@foreign_key_name+']')

FETCH NEXT FROM @CURSOR INTO @foreign_key_name, @keycnt, @foreign_table, @foreign_column_1, @foreign_column_2, 
                         @primary_table, @primary_column_1, @primary_column_2
END
CLOSE @CURSOR
PRINT 'Cursor 2 finished work'
---------------------------------------------------------------------------------------------------------------------
PRINT 'Temporary table droping'
drop table #ConTab
PRINT 'Finish'