{"id":429193,"date":"2021-04-18T06:03:18","date_gmt":"2021-04-17T22:03:18","guid":{"rendered":"http:\/\/4563.org\/?p=429193"},"modified":"2021-04-18T06:03:18","modified_gmt":"2021-04-17T22:03:18","slug":"%e5%a6%82%e4%bd%95%e7%94%a8%e4%b8%80%e6%9d%a1-sql-%e8%af%ad%e5%8f%a5%e5%90%8c%e6%97%b6%e6%9f%a5%e8%af%a2%e8%bf%99%e4%b8%89%e5%bc%a0%e6%95%b0%e6%8d%ae%e8%a1%a8%ef%bc%9f%e6%95%b0%e6%8d%ae%e8%a1%a8","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=429193","title":{"rendered":"\u5982\u4f55\u7528\u4e00\u6761 SQL \u8bed\u53e5\u540c\u65f6\u67e5\u8be2\u8fd9\u4e09\u5f20\u6570\u636e\u8868\uff1f\u6570\u636e\u8868\u5982\u4e0b"},"content":{"rendered":"
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\u5982\u4f55\u7528\u4e00\u6761 SQL \u8bed\u53e5\u540c\u65f6\u67e5\u8be2\u8fd9\u4e09\u5f20\u6570\u636e\u8868\uff1f\u6570\u636e\u8868\u5982\u4e0b <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : frozenway <\/span> <\/i> 13<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

####\u8868 a aid|name|cid|did|sex|xdate –|:–:|:–:|:–:|:–:|–: 1|john|1,3|1,2,3|\u672a\u77e5|2021-01-02<\/p>\n

####\u8868 c cid|cname –|–: 1|\u5c0f\u82b1 2|\u963f\u72f8 3|\u5927\u83ca<\/p>\n

####\u8868 d did|dname –|–: 1|\u5927\u9ec4 2|\u5c0f\u9ed1 3|\u5c0f\u7070<\/p>\n

\u9700\u8981\u4e00\u6b21\u6027\u67e5\u51fa\u8868 a aid=1 \u7684\u8be6\u7ec6\u6570\u636e\uff0c\u8868 a \u7684 cid \u5bf9\u5e94\u8868 c \u7684 cid\uff0c\u8868 a \u7684 did \u5bf9\u5e94\u8868 d \u7684 did<\/p>\n

\"\u5982\u4f55\u7528\u4e00\u6761<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (20<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
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    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : frozenway <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    “`
    SELECT a.*, c.*, d.* FROM a LEFT JOIN c ON c.cid IN a.cid LEFT JOIN d ON d.did IN a.did WHERE a.aid=1
    “`
    \u8fd9\u662f\u6211\u60f3\u5230\u7684\u8bed\u53e5\uff0c\u4f46\u662f\u62a5\u9519\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : hulalalla <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    FIND_IN_SET <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : eason1874 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    LEFT JOIN c
    ON FIND_IN_SET(c.cid, a.cid) <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : c6h6benzene <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u8868\u8bbe\u8ba1\u5c31\u2026\u4e00\u8a00\u96be\u5c3d\u3002<\/p>\n

    IN \u7684\u8fd0\u7b97\u5bf9\u8c61\u662f\u96c6\u5408\uff0c\u4f60\u9700\u8981\u60f3\u529e\u6cd5\u628a a \u8868\u4e2d\u7684 cid \u548c did \u62c6\u5f00\uff0c\u4f8b\u5982 SQL Server \u7684 STRING_SPLIT \u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
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    \u8cc7\u6df1\u5927\u4f6c : shenjinpeng <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5efa\u8bae\u5206\u5f00\u67e5 … , \u8054\u8868\u67e5\u51fa\u6765\u683c\u5f0f\u4e5f\u4e0d\u5bf9 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : lance6716 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7b2c\u4e00\u6b21\u89c1\u7b2c\u4e00\u8303\u5f0f\u90fd\u4e0d\u7b26\u5408\u7684\u2026\u2026 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : x86 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9 MySQL \u8868\u8ddf\u53d7\u59d4\u5c48\u4e86… <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : yeqizhang <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5206\u5f00\u67e5\u6ca1\u6bdb\u75c5\uff0c \u5982\u679c\u662f\u7ba1\u7406\u7cfb\u7edf\u7684\u5217\u8868\u5c55\u793a\uff0c \u5faa\u73af\u591a\u67e5\u51e0\u6b21\u800c\u5df2\u3002<\/p>\n

    \u8fd9\u4e0d\u4f1a\u662f\u9762\u8bd5\u9898\u5427\uff1f <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
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    \u8cc7\u6df1\u5927\u4f6c : customsshen <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    select a.*,c.* from a left join c on a.cid= c.cid where a.aid=1 union ( select a.* , d.* from a left join d on a.cid= d.cid where a.aid=1 ) <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : yeqizhang <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @customsshen \u5144\u5f1f\uff0c\u4f60\u770b\u9519\u4e86\uff0ca.cid \u662f\u9017\u53f7\u5206\u9694\u7684\u591a\u4e2a id <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : customsshen <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @yeqizhang \u54c8\u54c8\uff0c\u597d\u5bb6\u4f19\uff0c\u76f4\u63a5\u653e\u5f03\u5427\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : dqzcwxb <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u653e\u4e00\u6761 sql \u67e5\u6070\u6070\u662f\u6548\u7387\u6700\u4f4e\u7684\u65b9\u6848\u4e4b\u4e00 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : shyrock <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u62d2\u7edd\u56de\u7b54\u8fd9\u79cd\u95ee\u9898\uff0c\u5efa\u8bae\u8d76\u7d27\u628a\u8868 1 \u62c6\u5f00\u3002\u628a\u8bbe\u8ba1\u8fd9\u79cd\u8868\u7684\u4eba\u62c9\u53bb\u6302\u7535\u7ebf\u6746\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : pendulum <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8868 a \u7684\u8bbe\u8ba1\u771f\u662f\u3002\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : TomVista <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u796d\u5929\u5427 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : tcfenix <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5982\u679c\u4f60\u60f3 cid \u8ddf did \u7528\u6765\u505a\u5916\u952e\u7684\u8bdd\u4f60\u5c31\u5e94\u8be5\u641e\u4e2a relation \u8868, \u5efa\u7acb aid cid \u4e0e did \u7684\u591a\u5bf9\u591a\u5bf9\u591a\u7684\u5173\u7cfb<\/p>\n

    \u5230\u65f6\u5019\u7528\u8d77\u6765\u5c31\u5f88\u7b80\u5355<\/p>\n

    \u800c\u4e0d\u662f\u7528\u9017\u53f7\u5206\u9694…..\u4f60\u8fd9\u8bbe\u8ba1\u7684\u90fd\u80fd\u8fdb\u6559\u79d1\u4e66\u4e86….. <\/div>\n<\/p><\/div>\n<\/li>\n

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    \u8cc7\u6df1\u5927\u4f6c : KouShuiYu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    postgresql \u662f\u652f\u6301\u7684\uff0c\u53ef\u4ee5\u5427 cid\uff0cdid \u8f6c\u6210\u6570\u7ec4\u5173\u8054\u67e5\u8be2\uff0c <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : vynkicc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u89e3\u51b3\u5f00\u8868 1 \u7684\u4eba <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : AlkTTT <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9 A \u8868\u964d san \u503c\uff0c\u5feb\u8dd1\uff01 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : SjwNo1 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e3a\u5565\u8981\u4e00\u6761 sql <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u5982\u4f55\u7528\u4e00\u6761 SQL \u8bed\u53e5\u540c\u65f6\u67e5\u8be2\u8fd9…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/429193"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=429193"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/429193\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=429193"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=429193"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=429193"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}