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USE tempdb
GO
IF OBJECT_ID('t1') IS NOT NULL DROP TABLE t1
IF OBJECT_ID('t2') IS NOT NULL DROP TABLE t2
GO
CREATE TABLE t1(
id INT IDENTITY(1,1),
chanping NVARCHAR(10)
)
GO
CREATE TABLE t2(
id INT,
lexing NVARCHAR(50),
fenzu NVARCHAR(10)
)
GO
INSERT INTO t1 VALUES ('台式电脑');
INSERT INTO t1 VALUES ('笔记本');
INSERT INTO t1 VALUES ('手机');
INSERT INTO t1 VALUES ('电视机');
INSERT INTO t1 VALUES ('冰箱');
INSERT INTO t1 VALUES ('洗衣机');
INSERT INTO t1 VALUES ('沙发');
INSERT INTO t2 VALUES(1,'笔记本,电脑','电脑')
INSERT INTO t2 VALUES(2,'电视机,冰箱,洗衣机','家电')
SELECT * FROM t1 WHERE NOT EXISTS (
SELECT 1 FROM t2 WHERE ','+ t2.lexing+',' LIKE '%,'+t1.chanping+',%'
)
--注:t1.chanping 必须和 t2.lexing 的名称完全一致才可以
--比如 上面是台式电脑,下面是 电脑 就不行
--建议:增加一个中间表用于两者关联, 因为只有这样才合乎标准的3范式。
/*
id chanping
1 台式电脑
3 手机
7 沙发
*/
--测试数据
if not object_id(N'Tempdb..#T1') is null
drop table #T1
Go
Create table #T1([id] int,[chanpin] nvarchar(24))
Insert #T1
select 1,N'台式电脑' union all
select 2,N'笔记本' union all
select 3,N'手机' union all
select 4,N'电视机' union all
select 5,N'冰箱' union all
select 6,N'洗衣机' union all
select 7,N'沙发'
GO
if not object_id(N'Tempdb..#T2') is null
drop table #T2
Go
Create table #T2([id] int,[lexing] nvarchar(30),[fenzu] nvarchar(22))
Insert #T2
select 1,N'笔记本,电脑',N'电脑' union all
select 2,N'电视机,冰箱,洗衣机',N'家电'
Go
--测试数据结束
SELECT *
FROM #T1
WHERE NOT EXISTS ( SELECT 1
FROM #T2
WHERE CHARINDEX(',' + #T1.chanpin + ',',
',' + #T2.lexing + ',') > 0 )