{"id":85137,"date":"2020-03-27T23:39:19","date_gmt":"2020-03-27T15:39:19","guid":{"rendered":"http:\/\/4563.org\/?p=85137"},"modified":"2020-03-27T23:39:19","modified_gmt":"2020-03-27T15:39:19","slug":"%e8%af%b7%e6%95%99-mysql-%e6%88%aa%e5%8f%96%e7%9a%84%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=85137","title":{"rendered":"\u8bf7\u6559 mysql \u622a\u53d6\u7684\u95ee\u9898"},"content":{"rendered":"
\n
\n
\n

\u8bf7\u6559 mysql \u622a\u53d6\u7684\u95ee\u9898 <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : baiduyixia <\/span> <\/i> 8<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

update xx set content=substring_index(content,”\u6307\u5b9a\u5b57\u7b26”,-1)
\u622a\u53d6\u5230\u7684\u662f\u5728 content \u91cc\u4ece\u53f3\u6570\u5230\u5de6\u8fb9\u9047\u5230\u7b2c\u4e00\u4e2a\u201c\u6307\u5b9a\u5b57\u7b26\u201d\uff0c\u7136\u540e\u4fdd\u7559\u8be5\u5b57\u7b26\u540e\u9762\u7684\u5185\u5bb9\uff0c
\u8bf7\u6559\uff0c\u5982\u4f55\u622a\u53d6\uff0c\u4ece\u5de6\u5230\u53f3\u65f6\u7b2c\u4e00\u4e2a\u201c\u6307\u5b9a\u5b57\u7b26\u201d\uff0c\u7136\u540e\u4fdd\u7559\u8be5\u5b57\u7b26\u540e\u9762\u7684\u5185\u5bb9\uff1f \u8c22\u8c22<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (6<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : baiduyixia <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6bd4\u5982\u5b57\u6bb5\u91cc\u9762\u7684\u5185\u5bb9\u662f\uff1a1\uff0c2\uff0c3\uff0c4\uff0c5 \u548c 1\uff0c2\uff0c3 \u6211\u60f3\u5f97\u5230 2\uff0c3\uff0c4\uff0c5 \u548c 2\uff0c3 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zhuangjia <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    [function_substring-index]( https:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/string-functions.html#function_substring-index)<\/p>\n

    \u628a -1 \u6539\u6210 1 \u5c31\u53ef\u4ee5\u4e86 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : baiduyixia <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zhuangjia \u4e0d\u884c\u54e6\uff0c\u662f\u4ece\u5de6\u5230\u53f3\u65f6\u7b2c\u4e00\u4e2a\u201c\u6307\u5b9a\u5b57\u7b26\u201d\uff0c\u7136\u540e\u4fdd\u7559\u8be5\u5b57\u7b26\u540e\u9762\u7684\u5185\u5bb9\uff0c\u662f\u8be5\u5b57\u7b26\u540e\u9762\u7684\u5185\u5bb9\u800c\u4e0d\u662f\u524d\u9762 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zhuangjia <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @baiduyixia \u5bf9\u54e6\uff0c\u662f\u6211\u641e\u9519\u4e86\uff0c\u90a3\u5c31\u7ec4\u5408\u8d77\u6765\u5904\u7406\u597d\u4e86
    substring_index(‘1,2,3,4,5’, CONCAT(substring_index(‘1,2,3,4,5′,’,’,1), ‘,’), -1)
    \u6216\u8005
    substring(‘1,2,3,4,5’, (LOCATE(‘,’, ‘1,2,3,4,5’) + CHAR_LENGTH(‘,’))) <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : baiduyixia <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zhuangjia \u8fd8\u662f\u4e0d\u884c\u5509\uff0c\u60a8\u7684\u610f\u601d\u662f\uff1aupdate \u8868 xx set content=substring_index(‘content’, CONCAT(substring_index(‘content’,’\u6307\u5b9a\u5b57\u7b26’,1), ‘\u6307\u5b9a\u5b57\u7b26’), -1)
    \u8fd9\u6837\u51fa\u6765 content \u5185\u5bb9\u76f4\u63a5\u53d8\u6210 content \u8fd9\u4e2a\u82f1\u6587\u5355\u8bcd\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zhuangjia <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @baiduyixia
    update xxx set content = substring_index(content, CONCAT(substring_index(content,\u6307\u5b9a\u5b57\u7b26,1), \u6307\u5b9a\u5b57\u7b26), -1);
    \u6ce8\u610f\u662f\u5426\u6709\u5355\u5f15\u53f7\u6216\u53cc\u5f15\u53f7\u3002\u7528 \u5b57\u6bb5\u540d \u65f6\u5c31\u4e0d\u9700\u8981\u52a0\u5f15\u53f7\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u8bf7\u6559 mysql \u622a\u53d6\u7684\u95ee\u9898 \u8cc7\u6df1…<\/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\/85137"}],"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=85137"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/85137\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=85137"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=85137"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=85137"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}