sql怎么向一个表插入时，向另外一个表插入多行

sql如何向一个表插入时，向另外一个表插入多行
表kh（khdm，khmc）
  001，单位1
  002，单位2
.....
表xm（xmdm，xmmc）
  1001，牙刷
  1002，牙膏
.....
表gx（khdm，xmdm，jg）
  001,1001,10
  001,1002,20
  002,1001,11
  002,1002,19
 .....
向kh插入（003，单位3）时gx表也自动插入（003,1001,null），（003,1002,null）....xm表有多少条记录就插入多少

[解决办法]

SQL code

insert kh select '003','单位3'insert gx select a.khdm,b.xmdm,null from (select '003' khdm)a,(select xmdm from xm)b
[解决办法]
SQL code
SET XACT_ABORT ON BEGIN TRANSACTIONINSERT INTO kh(    khdm,    khmc)VALUES (    '003',    '单位3')INSERT INTO gx(    khdm,    xmdm,    jg)SELECT    '003',        xmdm,        NULLFROM    xm WITH(NOLOCK)        COMMIT TRANSACTION
[解决办法]
SQL code
if not object_id('kh') is null    drop table khGoCreate table kh([khdm] nvarchar(3),[khmc] nvarchar(3))Insert khselect N'001',N'单位1' union allselect N'002',N'单位2'Go if not object_id('xm') is null    drop table xmGoCreate table xm([xmdm] int,[xmmc] nvarchar(2))Insert xmselect 1001,N'牙刷' union allselect 1002,N'牙膏'Goif not object_id('gx') is null    drop table gxGoCreate table gx([khdm] nvarchar(3),[xmdm] int,[jg] int)goif object_id('tri','TR')is not null drop trigger trigocreate trigger tri on khfor insert asinsert gx select a.khdm,       b.xmdm,       null from (select  khdm from inserted)a,(select xmdm from xm)bgoinsert kh select '001',N'单位1'select * from gxinsert kh select '002',N'单位2' union all select '003',N'单位3'select * from gx/*khdm xmdm        jg---- ----------- -----------001  1001        NULL001  1002        NULL(2 row(s) affected)(4 row(s) affected)(2 row(s) affected)khdm xmdm        jg---- ----------- -----------001  1001        NULL001  1002        NULL003  1001        NULL002  1001        NULL003  1002        NULL002  1002        NULL(6 row(s) affected)*/