{"id":1919,"date":"2022-10-31T09:19:26","date_gmt":"2022-10-31T01:19:26","guid":{"rendered":"https:\/\/www.tra56.com\/?p=1919"},"modified":"2022-10-31T09:19:26","modified_gmt":"2022-10-31T01:19:26","slug":"1919","status":"publish","type":"post","link":"https:\/\/www.tra56.com\/1919.html","title":{"rendered":"SQL\u9762\u8bd5\u9898"},"content":{"rendered":"
\n
  • \n

    <\/span><\/p>\n

    \u73b0\u5728\u6211\u4eec\u5047\u8bbe\u53ea\u6709\u4e00\u4e2atable\uff0c\u540d\u4e3apages\uff0c\u6709\u56db\u4e2a\u5b57\u6bb5\uff0cid, url,title,body\u3002\u91cc\u9762\u50a8\u5b58\u4e86\u5f88\u591a\u7f51\u9875\uff0c\u7f51\u9875\u7684url\u5730\u5740\uff0ctitle\u548c\u7f51\u9875\u7684\u5185\u5bb9\uff0c\u7136\u540e\u4f60\u7528\u4e00\u4e2asql\u67e5\u8be2\u5c06url\u5339\u914d\u7684\u6392\u5728\u6700\u524d\uff0c title\u5339\u914d\u7684\u5176\u6b21\uff0cbody\u5339\u914d\u6700\u540e\uff0c\u6ca1\u6709\u4efb\u4f55\u5b57\u6bb5\u5339\u914d\u7684\uff0c\u4e0d\u8fd4\u56de\u3002<\/p>\n

    \u5c31\u662f\u4e0a\u9762\u8fd9\u9053\u9762\u8bd5\u9898\uff0c\u8ba9\u6211\u60f3\u4e86\u4e00\u4e2a\u4e0b\u5348\uff0c\u5728\u7f51\u4e0a\u627e\u8d44\u6599\uff0c\u6700\u540e\u7528\u4e0b\u9762\u65b9\u6cd5\u5b9e\u73b0<\/p>\n

    \n\n
    \n
    SELECT *
    FROM page where url like '%baidu%' or title like '%baidu%' or like ''
    ORDER BY CHARINDEX('baidu', url) DESC, CHARINDEX('baidu', title) DESC, 
          CHARINDEX('baidu', body) DESC<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u4f46\u6211\u611f\u89c9\u8fd9\u79cd\u65b9\u6cd5\u5e76\u4e0d\u662f\u6700\u7b80\u5355\u7684\uff0c\u540e\u6765\u628a\u8fd9\u4e2a\u65b9\u6cd5\u53d1\u7ed9\u9762\u8bd5\u7684\u4eba\uff0c\u4ed6\u7ed9\u6211\u4e86\u4e00\u79cd\u66f4\u7b80\u5355\u65b9\u6cd5\uff0c\u53ea\u8981\u7528\u57fa\u672c\u7684Sql\u8bed\u53e5\u5c31\u53ef\u4ee5\u5b9e\u73b0\u3002\u4ee3\u7801\u5982\u4e0b<\/p>\n

    \n\n
    \n
    select a.[id],a.mark from
    (
    select [page].[id],100 as mark from [page] where [page].[url] like '%baidu%'
    union
    select [page].[id],50 as mark from [page] where [page].[title] like '%baidu%'
    union
    select [page].[id],10 as mark from [page] where [page].[body] like '%baidu%'
    ) as a  order by mark desc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u7528union \u5b9e\u73b0\u8054\u5408\u67e5\u8be2\uff0c\u5728\u6bcf\u4e2a\u67e5\u8be2\u8bed\u53e5\u4e2d\u5b9a\u4e49\u4e00\u4e2a\u4e34\u65f6\u53d8\u91cfmark \u5e76\u7ed9mark\u8d4b\u503c\uff0c\u5728\u6700\u540e\u7684\u8f93\u51fa\u65f6\u91c7\u7528mark\u6765\u6392\u5e8f\uff0c\u8fd9\u6837\u5b9e\u73b0\uff0c\u975e\u5e38\u7b80\u5355\uff0c\u6211\u611f\u89c9\u8fd9\u9898\u66f4\u591a\u8003\u7814\u6211\u4eec\u7684\u7f16\u7a0b\u601d\u60f3\u3002<\/p>\n<\/p>\n<\/li>\n

  • \n

    <\/p>\n<\/li>\n<\/ul>\n

    <\/p>\n","protected":false},"excerpt":{"rendered":"

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