多表联检

2012-12-16

多表联查A表:id,createagentid,createtime,verifagentid,verifytime,statusB表:id,pid,sid,C表:pid,pname,

多表联查
A表:id,createagentid,createtime,verifagentid,verifytime,status
B表:id,pid,sid,
C表:pid,pname,
D表:sid,sname,
E表:agentid,agentname
A.id=B.id
a.creteagentid=E.agentid
a.verifyagentid=E.agentid
B.pid=C.pid
B.sid=D.sid
其中A为主表,A.id在B中会有多个.B.pid,sid在C,D中只有一个.
查询条件为C.pname,D.sname,
显示数据为:A.*,不重复
我试过inner join,left join ,right join等连接.写不出来了...
[最优解释]
SELECT * FROM A
INNER JOIN B ON A.id = B.id
  LEFT JOIN C ON B.pid = C.pid
  LEFT JOIN D ON B.sid = D.sid
  LEFT JOIN E AS E1 ON a.creteagentid = E1.agentid
  LEFT JOIN E AS E2 ON a.verifyagentid = E2.agentid
[其他解释]

引用:

SELECT * FROM A
INNER JOIN B ON A.id = B.id
  LEFT JOIN C ON B.pid = C.pid
  LEFT JOIN D ON B.sid = D.sid
  LEFT JOIN E AS E1 ON a.creteagentid = E1.agentid
  LEFT JOIN E AS E2 ON a……

亲,这样查出来不是我要的结果.我要的只要A.*不重复的
[其他解释]
SELECT * FROM A
INNER JOIN (SELECT DISTINCT id FROM B) B ON A.id = B.id
  LEFT JOIN C ON B.pid = C.pid
  LEFT JOIN D ON B.sid = D.sid
  LEFT JOIN E AS E1 ON a.creteagentid = E1.agentid
  LEFT JOIN E AS E2 ON a.verifyagentid = E2.agentid
或
SELECT * FROM A
  LEFT JOIN C ON B.pid = C.pid
  LEFT JOIN D ON B.sid = D.sid
  LEFT JOIN E AS E1 ON a.creteagentid = E1.agentid
  LEFT JOIN E AS E2 ON a.verifyagentid = E2.agentid
  WHERE EXISTS(SELECT 'X' FROM B WHERE A.ID = B.ID)
  试试。
[其他解释]

引用:

SELECT * FROM A
INNER JOIN (SELECT DISTINCT id FROM B) B ON A.id = B.id
  LEFT JOIN C ON B.pid = C.pid
  LEFT JOIN D ON B.sid = D.sid
  LEFT JOIN E AS E1 ON a.creteagentid = E1.agent……

两结果一样的吧,我运行了,没有区别呀
[其他解释]

WITH A AS (
SELECT '1' AS id,'A1' AS createagentid,'01:01:01' AS createtime,'B1' AS verifagentid,'01:01:01' AS verifytime,'1' AS status FROM DUAL
UNION ALL
SELECT '2' AS id,'A2' AS createagentid,'01:01:01' AS createtime,'B2' AS verifagentid,'01:01:01' AS verifytime,'1' AS status FROM DUAL
),
B AS (

SELECT '1' AS id,'C1' AS pid,'D1' AS sid FROM DUAL
UNION ALL
SELECT '1' AS id,'C1' AS pid,'D2' AS sid FROM DUAL
UNION ALL
SELECT '1' AS id,'C2' AS pid,'D3' AS sid FROM DUAL
UNION ALL
SELECT '1' AS id,'C3' AS pid,'D3' AS sid FROM DUAL
UNION ALL
SELECT '2' AS id,'E1' AS pid,'F1' AS sid FROM DUAL
UNION ALL
SELECT '2' AS id,'E1' AS pid,'F2' AS sid FROM DUAL
UNION ALL
SELECT '2' AS id,'E2' AS pid,'F3' AS sid FROM DUAL
UNION ALL
SELECT '2' AS id,'E3' AS pid,'F3' AS sid FROM DUAL
)
,
C AS (
SELECT 'C1' AS pid,'C1-NAME' AS pname FROM DUAL
UNION ALL
SELECT 'C2' AS pid,'C2-NAME' AS pname FROM DUAL
UNION ALL
SELECT 'C3' AS pid,'C3-NAME' AS pname FROM DUAL
UNION ALL
SELECT 'E1' AS pid,'E1-NAME' AS pname FROM DUAL
UNION ALL
SELECT 'E2' AS pid,'E2-NAME' AS pname FROM DUAL
UNION ALL
SELECT 'E3' AS pid,'E3-NAME' AS pname FROM DUAL
),
D AS (
SELECT 'D1' AS sid,'D1-NAME' AS sname FROM DUAL
UNION ALL
SELECT 'D2' AS sid,'D2-NAME' AS sname FROM DUAL
UNION ALL
SELECT 'D3' AS sid,'D3-NAME' AS sname FROM DUAL
UNION ALL
SELECT 'F1' AS sid,'F1-NAME' AS sname FROM DUAL
UNION ALL
SELECT 'F2' AS sid,'F2-NAME' AS sname FROM DUAL
UNION ALL
SELECT 'F3' AS sid,'F3-NAME' AS sname FROM DUAL
),
E AS (
SELECT 'A1' AS agentid,'A1-NAME' AS agentname FROM DUAL
UNION ALL
SELECT 'A2' AS agentid,'A2-NAME' AS agentname FROM DUAL
UNION ALL
SELECT 'B1' AS agentid,'B1-NAME' AS agentname FROM DUAL
UNION ALL
SELECT 'B2' AS agentid,'B2-NAME' AS agentname FROM DUAL
)
SELECT  DISTINCT A.* FROM A
INNER JOIN B ON A.id = B.id
  LEFT JOIN C ON B.pid = C.pid
  LEFT JOIN D ON B.sid = D.sid
  LEFT JOIN E E1 ON a.createagentid = E1.agentid
  LEFT JOIN E E2 ON a.verifagentid = E2.agentid

再不是就
[其他解释]
SELECT A.* ,e.name1,e.name2
  (SELECT DISTINCT id FROM(
      SELECT * FROM B b INNER JOIN C c ON b.pid=c.pid INNER JOIN D d ON b.sid=d.sid
  ) f)  INNER JOIN A a ON id=a.id
        INNER JOIN E e ON a.createagentid=e.agentid
        INNER JOIN E f ON a.verifyagentid=f.agentid;

这样就可以了!!!!因为是存储过程,所以查询条件可以放在SQL语句之外

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多表联检