Question

我有两个TABLE1实例，名为TABLE A＆amp;表C.我还有两个TABLE2实例，称为TABLE B＆amp;表D.

我需要将A和B作为GROUP1加入我需要将C和D作为GROUP2加入

所有在同一个查询中，所以我可以应用WHERE子句来添加条件以查找GROUP1和＆amp;之间的匹配。 GROUP2。

不确定最好的方法。两个嵌套的SELECT语句？内部联接？以下是我到目前为止的情况：

SELECT GROUP1.EMPLID，GROUP1.EMPL_STATUS，GROUP1.BANK_CD，GROUP1.ACCOUNT_NUM，GROUP2.EMPLID，GROUP2.EMPL_STATUS，GROUP2.BANK_CD，GROUP2.ACCOUNT_NUM FROM（

（SELECT * FROM （PS_DIR_DEP_DISTRIB A1，PS_CU_PAF B1 在哪里A1.EMPLID = B1.EMPLID 和B1.EMPL_STATUS IN（＆＃39; A＆＃39;，＆＃39; L＆＃39;＆＃39; P＆＃39;） AS GROUP1））

（SELECT * FROM （PS_DIR_DEP_DISTRIB C1，PS_CU_PAF D1 WHERE C1.EMPLID = D1.EMPLID 和D1.EMPL_STATUS IN（＆＃39; A＆＃39;，＆＃39; L＆＃39;，＆＃39; P＆＃39;） AS GROUP2））

WHERE GROUP1.EMPLID！= GROUP2.EMPLID AND GROUP1.EMPL_STATUS IN（＆＃39; A＆＃39;，＆＃39; L＆＃39;，＆＃39; P＆＃39;） AND GROUP2.EMPL_STATUS IN（＆＃39; A＆＃39;，＆＃39; L＆＃39;＆＃39; P＆＃39;） AND GROUP1.BANK_CD = GROUP2.BANK_CD AND GROUP1.ACCOUNT_NUM = GROUP2.ACCOUNT_NUM ）

Answer 1

我最终这样做了：

SELECT DISTINCT A.EMPLID "EMP1_ID", B.EMPL_STATUS "EMP1_STATUS", A.BANK_CD "EMP1_BANK", A.ACCOUNT_NUM "EMP1_ACCT", 
            C.EMPLID "EMP2_ID", D.EMPL_STATUS "EMP2_STATUS", C.BANK_CD "EMP2_BANK", C.ACCOUNT_NUM "EMP2_ACCT"

  FROM PS_DIR_DEP_DISTRIB A, PS_CU_PAF B, PS_DIR_DEP_DISTRIB C, PS_CU_PAF D

  WHERE A.EMPLID = B.EMPLID
    AND C.EMPLID = D.EMPLID
    AND A.EMPLID != C.EMPLID
    AND B.JOB_INDICATOR = 'P'
    AND D.JOB_INDICATOR = 'P'
    AND B.EMPL_STATUS IN ('A','L','P')
    AND D.EMPL_STATUS IN ('A','L','P')
    AND A.BANK_CD = C.BANK_CD
    AND A.ACCOUNT_NUM = C.ACCOUNT_NUM
    AND C.ACCOUNT_NUM != ' '

    AND A.EFFDT = (SELECT MAX(A_ED.EFFDT) FROM PS_DIR_DEP_DISTRIB A_ED
                   WHERE A.EMPLID = A_ED.EMPLID)

    AND C.EFFDT = (SELECT MAX(C_ED.EFFDT) FROM PS_DIR_DEP_DISTRIB C_ED
                   WHERE C.EMPLID = C_ED.EMPLID)

ORDER BY 4, 1

两个表的两个实例之间的两个连接

1 个答案: