{"id":438176,"date":"2021-04-17T10:52:33","date_gmt":"2021-04-17T02:52:33","guid":{"rendered":"http:\/\/4563.org\/?p=438176"},"modified":"2021-04-17T10:52:33","modified_gmt":"2021-04-17T02:52:33","slug":"%e5%90%84%e4%bd%8d%e5%a4%a7%e4%bd%ac%ef%bc%8c%e7%bb%99%e7%9c%8b%e4%b8%8b-mysql-%e8%af%ad%e5%8f%a5%e7%9a%84%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=438176","title":{"rendered":"\u5404\u4f4d\u5927\u4f6c\uff0c\u7ed9\u770b\u4e0b mysql \u8bed\u53e5\u7684\u95ee\u9898"},"content":{"rendered":"
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\u5404\u4f4d\u5927\u4f6c\uff0c\u7ed9\u770b\u4e0b mysql \u8bed\u53e5\u7684\u95ee\u9898 <\/h1>\n

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\u8cc7\u6df1\u5927\u4f6c : magicdu <\/span> <\/i> 0<\/span> <\/div>\n
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SELECT    factor_war,    warning_id   FROM    pes_warning_log_detail   WHERE    deptid = '517d16f720f7c6624cfb4245cc0586c0' <\/code><\/pre>\n
\u8fd9\u4e2a\u8bed\u53e5\u67e5\u8be2\u5341\u51e0\u79d2\uff0c\u8868\u6570\u636e\u91cf 50 \u591a\u4e07\uff0c\u8fd8\u80fd\u4f18\u5316\u5417\uff1f\u4e0d\u52a0 limit \"\u5404\u4f4d\u5927\u4f6c\uff0c\u7ed9\u770b\u4e0b<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (23<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
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     \u8cc7\u6df1\u5927\u4f6c : rekulas <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7d22\u5f15\u4e0d\u6b63\u5e38\u5427 \u5355\u5b57\u6bb5\u67e5\u8be2 5 \u5343\u4e07\u90fd\u4e0d\u4f1a\u8fd9\u4e48\u6162                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : zpfhbyx <\/span>  <\/div>\n
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                                                                 \u5efa\u4e2a\u524d\u7f00\u7d22\u5f15\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : magicdu <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 ![QQ \u56fe\u7247 20210409190503]( https:\/\/tva1.sinaimg.cn\/large\/0065GZmcly1gpdp73d2uqj30zr04jmxg.jpg) @rekulas \u7d22\u5f15\u662f\u8fd9\u6837\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : RRRoger <\/span>  <\/div>\n
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                                                                 50w \u5355\u8868\u67e5\u8be2\u4e0d\u81f3\u4e8e\u8fd9\u4e48\u6162\u5427\u3002<\/p>\n
    \u786e\u5b9a\u52a0\u7d22\u5f15\u4e86\uff1f                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : magicdu <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @RRRoger \u52a0\u4e86\uff0c\u662f\u4e0d\u662f\u52a0\u7684\u6709\u95ee\u9898 \uff0c\u770b\u4e0b\u4e0a\u9762\u7684\u56fe                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : rekulas <\/span>  <\/div>\n
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                                                                 \u91cd\u5efa\u7d22\u5f15\u8bd5\u8bd5\uff1f\u4f4e\u7248\u672c mysql \u6709\u53ef\u80fd\u7d22\u5f15\u5931\u6548 bug<\/p>\n
    \u53e6\u5916\u78c1\u76d8\u662f\u4ec0\u4e48\u578b\u53f7\uff0c\u6d4b\u8bd5\u4e0b\uff0c\u5927\u6982\u7387\u78c1\u76d8\u5bfc\u81f4                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : ch2 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5bf9 18W \u884c\u7684\u7ed3\u679c\u5341\u51e0\u79d2\u4e0d\u7b97\u6162\u5427                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : wpblank <\/span>  <\/div>\n
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                                                                 \u8fd9\u4e2a\u67e5\u8be2\u80fd\u67e5\u51fa 18w \u6761\u5417                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : JasonLaw <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 1. \u5728\u8fd9\u5f20\u8868\u4e2d\uff0c\u5927\u6982\u6709 18 \u4e07\u884c\u7684 deptid = ‘517d16f720f7c6624cfb4245cc0586c0’\uff08\u6570\u636e\u5e93\u4f30\u8ba1\u51fa\u6765\u7684\uff09\uff0c\u6240\u4ee5\u7d22\u5f15\u5728\u8fd9\u4e2d\u60c5\u51b5\u4e0b\u662f\u6ca1\u6709\u592a\u5927\u7528\u5904\u7684\u3002
    2. \u7d22\u5f15\u867d\u7136\u662f\u987a\u5e8f\u5b58\u50a8\u7684\uff0c\u4f46\u662f\u4f60 select \u7684 columns \u5728\u7d22\u5f15\u4e2d\u4e0d\u80fd\u627e\u5230\uff0c\u6240\u4ee5\u5bf9\u4e8e\u6bcf\u4e2a\u7b26\u5408\u6761\u4ef6\u7684\u884c\u7684\u4e3b\u952e\uff0c\u4f60\u90fd\u8981\u53bb primary index \u4e2d\u627e\u51fa\u6574\u884c\u6570\u636e\uff0c\u4f46\u662f\u8fd9\u4e2a\u65f6\u5019\uff0c\u4f60\u4f1a\u5728 primary index \u7684\u4e1c\u4e00\u4e2a\u5730\u65b9\u627e\uff0c\u897f\u4e00\u4e2a\u5730\u65b9\u627e\uff0c\u78c1\u76d8 IO \u8d85\u7ea7\u4e25\u91cd\u3002<\/p>\n
    \u5f53\u7136\uff0c\u8fd9\u53ea\u662f\u6211\u901a\u8fc7\u4f60\u7ed9\u7684\u4e00\u4e9b\u4fe1\u606f\u5224\u65ad\u51fa\u6765\u7684\uff0c\u4e0d\u4e00\u5b9a\u5bf9\u3002                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : sha851092391 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7d22\u5f15\u7684 Cardinality \u592a\u4f4e\u4e86\uff0c\u901a\u8fc7 deptid \u67e5\u8be2\u5339\u914d\u8bb0\u5f55\u6570\u592a\u591a\u3002
    \u4f60\u7684 SQL \u5339\u914d\u7684\u8bb0\u5f55\u5feb 20 \u4e07\uff0c\u4e0d\u662f\u6709 limit \u51cf\u5c11\u8fd4\u56de\u8bb0\u5f55\u6570\uff0c\u90a3\u5c31\u53ea\u80fd\u51cf\u5c11\u56de\u8868\u4e86\uff0c\u5efa\u7acb deptid + factor_war + warning_id \u7684\u8054\u5408\u7d22\u5f15\u51cf\u5c11\u56de\u8868\u6570\u770b\u770b\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : magicdu <\/span>  <\/div>\n
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                                                                 \u67e5\u8be2 10 \u4e07\u6761 @wpblank                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : JasonLaw <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @magicdu #3 \u987a\u4fbf\u8bf4\u4e00\u4e0b\uff0c\u5f53 Cardinality \u5f88\u5c0f\u7684\u60c5\u51b5\u4e0b\uff0c\u5efa\u7acb\u7d22\u5f15\u662f\u6ca1\u6709\u4ec0\u4e48\u610f\u4e49\u7684\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : rekulas <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 50w \u603b\u6570\u636e \u5373\u4f7f 18w \u6211\u89c9\u5f97\u8fd8\u662f\u504f\u6162\u4e86 \u8003\u8651\u78c1\u76d8\u6027\u80fd\u4e0d\u8db3<\/p>\n
    \u4f5c\u4e3a\u5bf9\u6bd4 \u6211\u6d4b\u8bd5\u4e0b\u6211\u8fd9\u8fb9\u7684\u901f\u5ea6 2000w \u6570\u636e\u8868 \u67e5\u8be2 20w \u8bb0\u5f55\u7684\u4e00\u4e2a\u5355\u5b57\u6bb5 \u4e5f\u4e0d\u8fc7\u624d 2 \u79d2\u5de6\u53f3                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : jotpot <\/span>  <\/div>\n
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                                                                 18w \u7684\u7ed3\u679c\u96c6\uff1f \u60f3\u60f3\u90fd\u6162\u3002\u78c1\u76d8\u8981\u8bfb\uff0c\u7f51\u7edc\u8981\u4f20\uff0c\u5ba2\u6237\u7aef\u5185\u5b58\u8981\u52a0\u8f7d\uff0c\u600e\u4e48\u4e0d\u6162\u5462\u3002\u8bdd\u8bf4\u4f60\u67e5 18w \u51fa\u6765\u5e72\u5565\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : ky11223344 <\/span>  <\/div>\n
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                                                                 deptid \u7d22\u5f15\u5220\u4e86\u6216\u8005\u5efa\u4e2a deptid factor_war warning_id \u7684\u8054\u5408\u7d22\u5f15\u8bd5\u8bd5                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : ikas <\/span>  <\/div>\n
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                                                                 \u8fd9\u4e0d\u662f sql \u95ee\u9898………                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : xuanbg <\/span>  <\/div>\n
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                                                                 \u628a 18 \u4e07\u591a\u6761\u8bb0\u5f55\u4ece\u6570\u636e\u5e93\u91cc\u9762\u8bfb\u51fa\u6765\u4f20\u5230\u4f60\u7535\u8111\u4e0a\uff0c\u5341\u51e0\u79d2\u4e0d\u662f\u5f88\u5feb\u4e86\u5417\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : securityCoding <\/span>  <\/div>\n
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                                                                 \u5206\u9875\uff0c\u5e26\u4e0a\u4e0a\u4e00\u6b21\u7684\u6e38\u6807                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : SjwNo1 <\/span>  <\/div>\n
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                                                                 \u8986\u76d6\u7d22\u5f15\u8bd5\u4e00\u4e0b \uff08\u8bdd\u8bf4\u4e5f\u4e0d\u81f3\u4e8e\u8fd9\u4e48\u6162\u5427\uff0c\u78c1\u76d8\u51fa\u95ee\u9898\u4e86\u5427\uff09                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : hbolive <\/span>  <\/div>\n
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                                                                 18 \u4e07\u7684\u6570\u636e\uff0c\u8fd9\u4e2a\u65f6\u95f4\u6b63\u5e38\u3002\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : rogerus <\/span>  <\/div>\n
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                                                                 50 \u4e07\u884c\u6570\u636e\uff0c\u4e00\u4e2a key \u5bf9\u5e94 18 \u4e07\u884c\u3002\u5144\u5f1f\uff0c\u4f60\u786e\u5b9a\u8fd9\u662f sql \u800c\u4e0d\u662f\u8868\u7ed3\u6784\u8bbe\u8ba1\u7684\u95ee\u9898\u5417\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : mazyi <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u8054\u5408\u7d22\u5f15\u8bd5\u8bd5\uff0c\u5e94\u8be5\u662f\u56de\u8868\u5bfc\u81f4\u53d8\u6162\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : qaqLjj <\/span>  <\/div>\n
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                                                                 \u8fd9\u4e2a\u6ca1\u6cd5\u4f18\u5316\uff0c\u52a0\u4e86\u8054\u5408\u7d22\u5f15\u4f30\u8ba1\u4e5f\u4e0d\u4f1a\u53d8\u5feb\u5f88\u591a\uff0c\u4f60\u8fd9\u4e2a\u67e5\u7684\u65b9\u5f0f\u6709\u95ee\u9898\uff0c\u67e5\u8be2\u6761\u4ef6\u5339\u914d\u7684\u7ed3\u679c\u8fc7\u591a\uff0c\u800c\u5df2\u6ca1\u6709 limit                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    \u5404\u4f4d\u5927\u4f6c\uff0c\u7ed9\u770b\u4e0b mysql \u8bed\u53e5…<\/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\/438176"}],"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=438176"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/438176\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=438176"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=438176"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=438176"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}