{"id":149698,"date":"2020-09-01T01:45:11","date_gmt":"2020-08-31T17:45:11","guid":{"rendered":"http:\/\/4563.org\/?p=149698"},"modified":"2020-09-01T01:45:11","modified_gmt":"2020-08-31T17:45:11","slug":"%e8%af%b7%e6%95%99%e6%8a%8a%e4%b8%89%e4%b8%aa-select-%e6%93%8d%e4%bd%9c%e6%95%b4%e5%90%88%e5%88%b0%e4%b8%80%e4%b8%aa-select-%e8%83%bd%e8%a7%a3%e5%86%b3%e7%9a%84%e8%af%ad%e5%8f%a5%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=149698","title":{"rendered":"\u8bf7\u6559\u628a\u4e09\u4e2a SELECT \u64cd\u4f5c\u6574\u5408\u5230\u4e00\u4e2a SELECT \u80fd\u89e3\u51b3\u7684\u8bed\u53e5\uff1f"},"content":{"rendered":"
\n
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\u8bf7\u6559\u628a\u4e09\u4e2a SELECT \u64cd\u4f5c\u6574\u5408\u5230\u4e00\u4e2a SELECT \u80fd\u89e3\u51b3\u7684\u8bed\u53e5\uff1f <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : qazwsxkevin <\/span> <\/i> 10<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
\u4ee5\u524d\u5199\u7684\u8bed\u53e5\uff1a
SELECT \u751f\u6210\u65f6\u95f4 FROM result WHERE `\u578b\u53f7`=’1′ ORDER BY \u751f\u6210\u65f6\u95f4 DESC LIMIT 1;
SELECT \u751f\u6210\u65f6\u95f4 FROM result WHERE `\u578b\u53f7`=’2′ ORDER BY \u751f\u6210\u65f6\u95f4 DESC LIMIT 1;
SELECT \u751f\u6210\u65f6\u95f4 FROM result WHERE `\u578b\u53f7`=’3′ ORDER BY \u751f\u6210\u65f6\u95f4 DESC LIMIT 1; <\/p>\n

\u751f\u6210\u65f6\u95f4\u662f datatime
\u7a0b\u5e8f\u62ff\u5230\u7ed3\u679c\u540e\uff0c\u518d\u672c\u5730\u7b97\u6cd5\u7b97\u51fa\u6700\u5c0f(\u65f6\u95f4\u6700\u65e9\u7684\u503c\uff09
\u8bf7\u95ee\u5982\u679c\u5728 Mysql \u8bed\u53e5\u4e0a\uff0c\u5982\u4f55\u5b9e\u73b0\u4e00\u53e5\u51fa\u7ed3\u679c\u5462\uff1f
`\u578b\u53f7`=’3’\u5f88\u6709\u53ef\u80fd\u6ca1\u6709\u5b58\u5728\u3002\u3002\u3002 <\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (24<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : saulshao <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7167\u4e0b\u9762\u8fd9\u6837\u5199\u5c31\u884c\u4e86\uff0c\u76f4\u63a5\u51fa\u7ed3\u679c\u3002
    \u00b7\u00b7\u00b7
    SELECT \u751f\u6210\u65f6\u95f4 FROM result WHERE `\u578b\u53f7`in (1,2,3) ORDER BY \u751f\u6210\u65f6\u95f4 DESC LIMIT 1;
    \u00b7\u00b7\u00b7 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : jay0726 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u521a\u60f3\u56de\u590d\uff0c\u4e0a\u62a2\u5148\u4e00\u6b65\u554a <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : saulshao <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e3a\u5565\u8fd9\u4e2a md \u8bed\u6cd5\u4e0d\u8d77\u4f5c\u7528\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : wangyanrui <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    union \u6210\u4e34\u65f6\u8868\uff0c\u7136\u540e\u6392\u5e8f\u52a0 limit 1
    \u4f46\u662f\u8fd9\u73a9\u610f\u5982\u679c\u6027\u80fd\u538b\u529b\u4e0d\u662f\u7279\u522b\u5927\uff0c\u8fd8\u662f\u4ee3\u7801\u5904\u7406\u5427\uff0c\u53ef\u8bfb\u6027\u592a\u5dee\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : saulshao <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5199\u9519\uff0cmarkdown <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : wangyanrui <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u778e\u4e86\uff0c\u4e00\u6b63\u89e3\u3002\u4ee5\u4e3a\u4e0d\u662f\u540c\u4e00\u4e2a\u8868 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : saulshao <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u73a9\u610f\u5982\u679c\u4e0d\u662f\u6027\u80fd\u538b\u529b\u7279\u522b\u5927\uff0c\u53cd\u800c\u4e0d\u5efa\u8bae\u4ee3\u7801\u5904\u7406\uff0c\u56e0\u4e3a\u8fd9\u4e1c\u897f\u5916\u9762\u5957\u4e2a\u51fd\u6570\uff0c\u5c31\u76f8\u5f53\u4e8e\u53ef\u8bfb\u6027\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : MeowOvO <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    “`
    SELECT \u751f\u6210\u65f6\u95f4 FROM result WHERE `\u578b\u53f7`in (1,2,3) ORDER BY \u751f\u6210\u65f6\u95f4 DESC LIMIT 1;
    “`
    @saulshao Test <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : MeowOvO <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @MeowOvO OK \u4e5f\u4e0d\u597d\u7528=-= <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : aborigine <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    select min(\u751f\u6210\u65f6\u95f4) from result where \u578b\u53f7=1 or \u578b\u53f7=2 or \u578b\u53f7=3 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : aborigine <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5982\u679c\u751f\u6210\u65f6\u95f4\u6ca1\u6709\u7d22\u5f15 \u90a3\u7528 min \u6548\u7387\u66f4\u9ad8 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ysc3839 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @saulshao @MeowOvO
    \u56de\u590d\u5185\u5bb9\u4e0d\u652f\u6301 MarkDown \u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : mcdunc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    lz \u662f\u60f3\u5206\u522b\u628a\u578b\u53f7\u4e3a 1,2,3 \u7684\u6700\u65e9\u751f\u6210\u65f6\u95f4\u7ed9\u62bd\u51fa\u6765\u5417\u8fd8\u662f\u67e5\u603b\u4f53\u7684\u6700\u65e9\u751f\u6210\u65f6\u95f4\uff1f\u5982\u679c\u6309 1 \u7684\u90a3\u79cd\u67e5\u51fa\u6765\u7684\u4e0d\u5e94\u8be5\u662f\u603b\u4f53\u7684\u6700\u65e9\u5417\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : a719114136 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    select \u578b\u53f7,min(\u65f6\u95f4) from xx where \u578b\u53f7 in(1,2,3) group by \u578b\u53f7 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : someonedeng <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    SELECT * from (SELECT \u751f\u6210\u65f6\u95f4,1 as \u578b\u53f7 FROM result WHERE `\u578b\u53f7`=’1′ ORDER BY \u751f\u6210\u65f6\u95f4 DESC LIMIT 1 ) t1 union all
    SELECT * from (SELECT \u751f\u6210\u65f6\u95f4,2 as \u578b\u53f7 FROM result WHERE `\u578b\u53f7`=’2′ ORDER BY \u751f\u6210\u65f6\u95f4 DESC LIMIT 1 ) t2 union all
    SELECT * from (SELECT \u751f\u6210\u65f6\u95f4,3 as \u578b\u53f7 FROM result WHERE `\u578b\u53f7`=’3′ ORDER BY \u751f\u6210\u65f6\u95f4 DESC LIMIT 1) t3;<\/p>\n

    ![20200828001706.png]( https:\/\/i.loli.net\/2020\/08\/28\/KsEdn2bCLhtMm9T.png)
    ![20200828001657.png]( https:\/\/i.loli.net\/2020\/08\/28\/GfwKF2HCMZ7tmQU.png) <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : lyusantu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e0d\u8003\u8651\u6027\u80fd\u60c5\u51b5\u4e0b\uff0c\u5185\u5c42 union\uff0c\u5916\u5c42\u518d select * limit \u4e00\u6b21\u5373\u53ef <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : xuanbg <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @saulshao \u4f60\u8fd9\u4e2a\u4e0d\u7b49\u4ef7\u554a\uff0c\u4eba\u5bb6\u662f\u6bcf\u4e2a\u578b\u53f7 1 \u6761\uff0c\u4f60\u7684\u53ef\u80fd 3 \u6761\u90fd\u662f 1 \u4e2a\u578b\u53f7\u3002<\/p>\n

    \u6b63\u786e\u7b54\u6848\u662f\u4f7f\u7528 union all \u5173\u952e\u8bcd\u3002<\/p>\n

    SELECT \u751f\u6210\u65f6\u95f4 FROM result WHERE `\u578b\u53f7`=’1′ ORDER BY \u751f\u6210\u65f6\u95f4 DESC LIMIT 1 union all
    SELECT \u751f\u6210\u65f6\u95f4 FROM result WHERE `\u578b\u53f7`=’2′ ORDER BY \u751f\u6210\u65f6\u95f4 DESC LIMIT 1 union all
    SELECT \u751f\u6210\u65f6\u95f4 FROM result WHERE `\u578b\u53f7`=’3′ ORDER BY \u751f\u6210\u65f6\u95f4 DESC LIMIT 1; <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : xuanbg <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @xuanbg sql \u590d\u5236\u8fc7\u6765\u5fd8\u8bb0\u6539\u4e86\uff0c15 \u7684\u662f\u6b63\u786e\u7684\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : guanhui07 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    “`
    unionall
    “` <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : coderfox <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    SELECT \u578b\u53f7, MAX(\u751f\u6210\u65f6\u95f4) FROM result WHERE \u578b\u53f7 IN (‘1’, ‘2’, ‘3’) GROUP BY \u578b\u53f7 ORDER BY \u578b\u53f7, \u751f\u6210\u65f6\u95f4 DESC; <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : coderfox <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @coderfox #20 \u66f4\u6b63\u4e00\u4e0b\uff0c\u53ea\u9700\u8981 SELECT \u578b\u53f7, MAX(\u751f\u6210\u65f6\u95f4) FROM test WHERE \u578b\u53f7 IN (‘1’, ‘2’, ‘3’) GROUP BY \u578b\u53f7; <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : jzmws <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8003\u8651\u7528 case ? <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : bigpower777 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    SELECT
    s1.d1,
    s2.d2,
    s3.d3
    FROM
    (select CREATE_DATE as d1 from account_system where MZ=’01’ ORDER BY CREATE_DATE desc limit 1) s1,
    (select CREATE_DATE as d2 from account_system where MZ=’02’ ORDER BY CREATE_DATE desc limit 1) s2,
    (select CREATE_DATE as d3from account_system where MZ=’03’ ORDER BY CREATE_DATE desc limit 1) s3 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : gaius <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    pg \u6216\u8005 mysql8 \u7528\u7a97\u53e3\u51fd\u6570 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u8bf7\u6559\u628a\u4e09\u4e2a SELECT \u64cd\u4f5c\u6574\u5408…<\/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\/149698"}],"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=149698"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/149698\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=149698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=149698"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=149698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}