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  • oracle update left join 写法

    oracle update left join 写法 (修改某列,条件字段在关联表中)
    案例:
    E:考核表 X,:用户表
    USERNAME 关联
    需求:修改营业部最高分
    分析:通过登录账号的营业部ORG_ID 更新E表,E表中无ORG_ID 字段,X表中可以关联.
    写法一:
    UPDATE USER_INFO E
    SET E.TOP_SCORE =
    (SELECT 230
    FROM USER X
    WHERE E.USERNAME = X.USERNAME
    and X.ORG_ID = ‘B26603C4BB9B0042E0430ABC694C0042’)
    WHERE E.USERNAME = (SELECT X.USERNAME
    FROM USER X
    WHERE E.USERNAME = X.USERNAME
    and X.ORG_ID = ‘B26603C4BB9B0042E0430ABC694C0042’)

    写法二:
    UPDATE USER_INFO E
    SET E.TOP_SCORE = 230
    WHERE exists (SELECT X.USERNAME
    FROM USER X
    WHERE E.USERNAME= X.USERNAME
    and X.ORG_ID = ‘B26603C4BB9B0042E0430ABC694C0042’)

    写法三:
    UPDATE USER_INFO E
    E.TOP_SCORE = 230
    WHERE E.USERNAME in(
    SELECT X.USERNAME FROM USER X WHERE
    E.USERNAME =X.USERNAME and
    X.ORG_ID=’B26603C4BB9B0042E0430ABC694C0042’)
    ---------------------
    作者:guidestarzh
    来源:CSDN
    原文:https://blog.csdn.net/guidestarzh/article/details/81509058
    版权声明:本文为博主原创文章,转载请附上博文链接!

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  • 原文地址:https://www.cnblogs.com/Struts-pring/p/11053211.html
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