sql 模糊查询另外一张表的字段

[cn_shuyang]

两张表，
ECN表里面有ID，日期，ECNNum，文号，机种...等字段，（ECNNum长度12位）
Rules表里面有ECNnum_Rules，Class_Rules，Fclass_Rules字段，（ECNnum_Rules长度为2位）

请问如何：将表Rules里面ECNnum_Rules做为条件，判断ECN表里ECNNum前2位等于ECNnum_Rules的数据
AND
如果等于的话，就把数据要出来
然后在在这些数据里面判断ECN表中的文号是否等于Rules表中的ECNnum_Class字段
OR
或者ECN表中的机种名是否包含Rules表中的ECNnum_Fclass字段，
是的话，则在将这些数据抓取出来。谢谢。

[XXXXn帅气]

select *from (select * from Rules where ECN.文号=ECNnum_CLass or CHARINDEX(ECNnum_FcLass ,ECN.机种名)>0) a join ECN on a.ECNnum_rules=LEFT(ECN.ECNNum,2)

[RINK_1]

SELECT A.* 
FROM ECN A JOIN RULES B ON LEFT(A.ECNNUM,2)=B.ECNNUM_RULES AND A.文号=B.ECNnum_Class
UNION 
SELECT A.*
FROM ECN A JOIN RULES B ON A.机种名 LIKE '%'+B.ECNnum_Fclass+'%'

[honghuangbu0446]

select * from ECN where exists ( select * from Rules where ECNnum_Rules = left( ECNNum, 2 ));

[xiaoliuvv]

select *from (select * from Rules where ECN.文号=ECNnum_CLass or CHARINDEX(ECNnum_FcLass ,ECN.机种名)>0) a  join ECN on  a.ECNnum_rules=LEFT(ECN.ECNNum,2)

[cn_shuyang]

引用 2 楼 RINK_1 的回复:

SELECT A.* 
FROM ECN A JOIN RULES B ON LEFT(A.ECNNUM,2)=B.ECNNUM_RULES AND A.文号=B.ECNnum_Class
UNION 
SELECT A.*
FROM ECN A JOIN RULES B ON A.机种名 LIKE '%'+B.ECNnum_Fclass+'%'

跑出来的结果有一个问题就是ECNNUM不等于ecnnum_rules的数据也会跑出来 。

[cn_shuyang]

补充图片实列

[八月十八]

CREATE TABLE #ECN
(PID VARCHAR(10),
 DEPT_P VARCHAR(10),
 ID VARCHAR(10))

INSERT INTO #ECN
SELECT 'EC123','A1','AA1' UNION ALL
SELECT 'EC124','B2','AA2' UNION ALL
SELECT 'ED125','A3','AA3' UNION ALL
SELECT 'EC126','A4','AA4'UNION ALL
SELECT 'EC127','B4','AA5'UNION ALL
SELECT 'EC128','A6','AA6'

CREATE TABLE #RULES
(PID VARCHAR(10),
 DEPT_P VARCHAR(10),
 ID VARCHAR(10))

INSERT INTO #RULES
SELECT 'EC','A1','AA2' UNION ALL
SELECT 'MP','A2','AA1' UNION ALL
SELECT '','A3','' UNION ALL
SELECT '','A4',''UNION ALL
SELECT '','A6',''


SELECT A.* 
FROM #ECN A JOIN #RULES B ON LEFT(A.PID,2)=B.PID AND A.DEPT_P=B.DEPT_P
UNION 
SELECT A.*
FROM #ECN A JOIN #RULES B ON A.ID LIKE '%'+B.ID+'%'