{"id":1351,"date":"2022-10-26T15:27:04","date_gmt":"2022-10-26T07:27:04","guid":{"rendered":"http:\/\/175.24.184.226\/?p=1351"},"modified":"2022-10-26T15:27:33","modified_gmt":"2022-10-26T07:27:33","slug":"%e4%bd%bf%e7%94%a8mysql%e5%ae%9e%e7%8e%b0%e5%88%86%e9%a1%b5%e6%9f%a5%e8%af%a2","status":"publish","type":"post","link":"\/?p=1351","title":{"rendered":"\u4f7f\u7528MySQL\u5b9e\u73b0\u5206\u9875\u67e5\u8be2"},"content":{"rendered":"

\u4f7f\u7528MySQL\u5b9e\u73b0\u5206\u9875\u67e5\u8be2<\/strong><\/h2>\n

\u5728\u9879\u76ee\u5f00\u53d1\u5f53\u4e2d\uff0c\u7ecf\u5e38\u8981\u5b9e\u73b0\u5206\u9875\u529f\u80fd\uff0c\u5728\u9762\u8bd5\u65f6\u4e5f\u4f1a\u7ecf\u5e38\u88ab\u95ee\u5230\uff0c\u4ec0\u4e48\u662f\u5206\u9875\u3002\u8fd9\u662f\u56e0\u4e3a\u5728\u4e00\u4e2a\u9875\u9762\u4e0a\u80fd\u591f\u663e\u793a\u7684\u6570\u636e\u662f\u6709\u9650\u7684\uff0c\u800c\u5b58\u653e\u5728\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u5f80\u5f80\u5f88\u591a\uff0c\u6211\u4eec\u5fc5\u987b\u5c06\u8fd9\u4e9b\u6570\u636e\u5b89\u653e\u5230\u4e0d\u540c\u7684\u9875\u9762\u4e2d\u53bb\u3002<\/p>\n

\u4e00\u3001\u5206\u9875<\/strong><\/h2>\n

\"img\"<\/p>\n

1. \u4ec0\u4e48\u662f\u5206\u9875<\/strong><\/h3>\n

\u4e00\u822c\u5728\u5ba2\u6237\u7aef\u5b9e\u73b0\u5206\u9875\u529f\u80fd\u7684\u65f6\u5019\uff0c\u8981\u663e\u793a\u5f53\u524d\u9875\u7684\u6570\u636e\u3001\u5f53\u524d\u6240\u5728\u9875\u6570\u3001\u4e34\u8fd1\u9875\u9762\u7684\u6309\u94ae\u4ee5\u53ca\u603b\u9875\u6570\u7b49\u7b49\u3002\u8fd9\u4e9b\u6570\u636e\u968f\u7740\u7ffb\u9875\u7684\u8fdb\u884c\u80fd\u591f\u52a8\u6001\u7684\u53d8\u5316\uff0c\u4e3a\u4e86\u5b9e\u73b0\u8fd9\u6837\u7684\u6548\u679c\uff0c\u4e00\u822c\u4f1a\u91c7\u53d6\u4e24\u79cd\u529e\u6cd5\uff1a\u771f\u5206\u9875<\/strong>\u548c\u5047\u5206\u9875<\/strong>\u3002\u8fd9\u6837\u7684\u5212\u5206\u65b9\u5f0f\u662f\u4ece\u4e0e\u6570\u636e\u5e93\u7684\u4ea4\u4e92\u65b9\u5f0f\u51fa\u53d1\u7684\uff0c\u662f\u6bcf\u6b21\u7ffb\u9875\u65f6\u90fd\u8fdb\u884c\u67e5\u8be2\u8fd8\u662f\u4e00\u6b21\u6027\u67e5\u51fa\u6240\u6709\u7684\u6570\u636e\u3002<\/p>\n

2. \u771f\u5206\u9875<\/strong><\/h3>\n

\u771f\u5206\u9875\u6307\u7684\u662f\u6bcf\u6b21\u5728\u8fdb\u884c\u7ffb\u9875\u65f6\u90fd\u53ea\u67e5\u8be2\u51fa\u5f53\u524d\u9875\u9762\u7684\u6570\u636e\uff0c\u7279\u70b9\u5c31\u662f\u4e0e\u6570\u636e\u5e93\u7684\u4ea4\u4e92\u6b21\u6570\u8f83\u591a\uff0c\u4f46\u662f\u6bcf\u6b21\u67e5\u8be2\u7684\u6570\u636e\u91cf\u8f83\u5c11\uff0c\u6570\u636e\u4e5f\u4e0d\u9700\u8981\u4e00\u76f4\u4fdd\u5b58\u5728\u5185\u5b58\u4e2d\u3002\u9002\u7528\u4e8e\u6570\u636e\u91cf\u6bd4\u8f83\u5927\u7684\u573a\u666f\uff0c\u6570\u636e\u4e0d\u9002\u5408\u5168\u91cf\u67e5\u51fa\u7684\u60c5\u51b5\u3002<\/p>\n

\"img\"<\/p>\n

3. \u5047\u5206\u9875<\/strong><\/h3>\n

\u5047\u5206\u9875\u6307\u7684\u662f\u5bf9\u4e8e\u8981\u663e\u793a\u7684\u6570\u636e\u4e00\u6b21\u6027\u5168\u90e8\u67e5\u51fa\uff0c\u4e00\u76f4\u5b58\u5728\u5728\u670d\u52a1\u7aef\u6216\u5ba2\u6237\u7aef\uff0c\u5728\u524d\u7aef\u8fdb\u884c\u5206\u9875\u6216\u7531\u670d\u52a1\u7aef\u63a7\u5236\u5206\u9875\u3002\u5c06\u6839\u636e\u5f53\u524d\u6240\u5728\u9875\u6765\u8ba1\u7b97\u5e94\u8be5\u663e\u793a\u7684\u6570\u636e\u6240\u5728\u4e0b\u6807\uff0c\u7528\u5faa\u73af\u53d6\u51fa\u76ee\u6807\u6570\u636e\u3002\u53ea\u6709\u5f53\u4f1a\u8bdd\u65ad\u5f00\u6216\u9875\u9762\u5173\u95ed\uff0c\u76f8\u5e94\u7684\u8d44\u6e90\u624d\u4f1a\u88ab\u91ca\u653e\u3002<\/p>\n

\"img\"<\/p>\n

4. \u7f13\u5b58\u5c42<\/strong><\/h3>\n

\u771f\u5206\u9875\u548c\u5047\u5206\u9875\u90fd\u8981\u548c\u6570\u636e\u5e93\u8fdb\u884c\u4ea4\u4e92\uff0c\u5bf9\u4e8e\u771f\u5206\u9875\u6765\u8bf4\u4e0d\u9700\u8981\u62c5\u5fc3\u6570\u636e\u540c\u6b65\u7684\u95ee\u9898\uff0c\u56e0\u4e3a\u6bcf\u6b21\u90fd\u662f\u67e5\u8be2\u51fa\u6700\u65b0\u7684\uff0c\u4f46\u662f\u6570\u636e\u5e93\u7684\u8d1f\u62c5\u4f1a\u5f88\u91cd\uff0c\u5c24\u5176\u662f\u7528\u6237\u91cf\u5927\u7684\u60c5\u51b5\u4e0b\u3002\u5047\u5206\u9875\u53ef\u4ee5\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u51cf\u8f7b\u6570\u636e\u5e93\u7684\u538b\u529b\uff0c\u4f46\u662f\u6570\u636e\u4e0d\u80fd\u53ca\u65f6\u5f97\u5230\u540c\u6b65\uff0c\u9664\u975e\u91cd\u65b0\u8bf7\u6c42\u6216\u9875\u9762\u5237\u65b0\u3002\u4e00\u822c\u5728\u4f01\u4e1a\u4e2d\u4f1a\u6709\u7f13\u5b58\u5c42\u7684\u5b58\u5728\uff0c\u65e2\u80fd\u6709\u6548\u964d\u4f4e\u6570\u636e\u5e93\u7684\u538b\u529b\uff0c\u53c8\u80fd\u53ca\u65f6\u7684\u8fdb\u884c\u6570\u636e\u540c\u6b65\u3002\u5728\u5bf9\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u4fee\u6539\u540e\uff0c\u8981\u5c06\u53d8\u66f4\u540e\u7684\u6570\u636e\u53ca\u65f6\u540c\u6b65\u5230\u7f13\u5b58\u5c42\uff0c\u5728\u8fdb\u884c\u6570\u636e\u67e5\u8be2\u65f6\u4ece\u7f13\u5b58\u5c42\u83b7\u53d6\u3002<\/p>\n

\"img\"<\/p>\n

\u4e8c\u3001MySQL\u5b9e\u73b0\u5206\u9875<\/strong><\/h2>\n

\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u901a\u8fc7\u771f\u5206\u9875\u7684\u65b9\u5f0f\uff0c\u6bcf\u6b21\u53d6\u51fa\u6240\u9700\u6570\u636e\u3002\u5bf9\u4e8e\u4e0d\u540c\u7684\u6570\u636e\uff0c\u5b9e\u73b0\u5206\u9875\u6709\u4e0d\u540c\u7684\u65b9\u5f0f\uff0c\u5728MySQL\u4e2d\u53ef\u4ee5\u4f7f\u7528LIMIT\u6765\u9650\u5236\u67e5\u8be2\u51fa\u7684\u6570\u636e\u3002<\/p>\n

1. LIMIT\u7528\u6cd5<\/strong><\/h3>\n

LIMIT\u51fa\u73b0\u5728\u67e5\u8be2\u8bed\u53e5\u7684\u6700\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u53c2\u6570\u6216\u4e24\u4e2a\u53c2\u6570\u6765\u9650\u5236\u53d6\u51fa\u7684\u6570\u636e\u3002\u5176\u4e2d\u7b2c\u4e00\u4e2a\u53c2\u6570\u4ee3\u8868\u504f\u79fb\u91cf\uff1aoffset\uff08\u53ef\u9009\u53c2\u6570\uff09\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4ee3\u8868\u53d6\u51fa\u7684\u6570\u636e\u6761\u6570\uff1arows\u3002<\/p>\n

    \n
  • \u5355\u53c2\u6570\u7528\u6cd5<\/li>\n<\/ul>\n

    \u5f53\u6307\u5b9a\u4e00\u4e2a\u53c2\u6570\u65f6\uff0c\u9ed8\u8ba4\u7701\u7565\u4e86\u504f\u79fb\u91cf\uff0c\u5373\u504f\u79fb\u91cf\u4e3a0\uff0c\u4ece\u7b2c\u4e00\u884c\u6570\u636e\u5f00\u59cb\u53d6\uff0c\u4e00\u5171\u53d6rows\u6761\u3002<\/p>\n

    \/* \u67e5\u8be2\u524d5\u6761\u6570\u636e *\/\nSELECT * FROM Student LIMIT 5;<\/code><\/pre>\n
    \u590d\u5236<\/p>\n
      \n
    • \u53cc\u53c2\u6570\u7528\u6cd5<\/li>\n<\/ul>\n
      \u5f53\u6307\u5b9a\u4e24\u4e2a\u53c2\u6570\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u504f\u79fb\u91cf\u7684\u53d6\u503c\u662f\u4ece0\u5f00\u59cb\u7684\uff0c\u6b64\u65f6\u53ef\u4ee5\u6709\u4e24\u79cd\u5199\u6cd5\uff1a<\/p>\n
      \/* \u67e5\u8be2\u7b2c1-10\u6761\u6570\u636e *\/\nSELECT * FROM Student LIMIT 0,10;\n\/* \u67e5\u8be2\u7b2c11-20\u6761\u6570\u636e *\/\nSELECT * FROM Student LIMIT 10 OFFSET 10;<\/code><\/pre>\n
      \u590d\u5236<\/p>\n
      2. \u5206\u9875\u516c\u5f0f<\/strong><\/h3>\n
        \n
      • \u603b\u9875\u6570\u8ba1\u7b97<\/li>\n<\/ul>\n
        \u5728\u8fdb\u884c\u5206\u9875\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u5148\u6839\u636e\u6570\u636e\u603b\u91cf\u6765\u5f97\u51fa\u603b\u9875\u6570\uff0c\u8fd9\u9700\u8981\u7528\u5230COUNT\u51fd\u6570\u548c\u5411\u4e0a\u53d6\u6574\u51fd\u6570CEIL\uff0cSQL\u5982\u4e0b\uff1a<\/p>\n
        \/* \u83b7\u5f97\u6570\u636e\u603b\u6761\u6570 *\/\nSELECT COUNT(*) FROM Student;\n\/* \u5047\u8bbe\u6bcf\u9875\u663e\u793a10\u6761\uff0c\u5219\u76f4\u63a5\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97\uff0c\u7136\u540e\u5411\u4e0a\u53d6\u6574 *\/\nSELECT CEIL(COUNT(*) \/ 10) AS pageTotal FROM Student;<\/code><\/pre>\n
        \u590d\u5236<\/p>\n
          \n
        • \u6838\u5fc3\u4fe1\u606f\n
            \n
          • \u5f53\u524d\u9875\uff1apageNumber<\/li>\n
          • \u6bcf\u9875\u6570\u636e\u91cf\uff1apageSize<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
            \u5728\u5b9e\u9645\u64cd\u4f5c\u4e2d\uff0c\u6211\u4eec\u80fd\u591f\u5f97\u5230\u7684\u4fe1\u606f\u6709\u5f53\u524d\u6240\u5728\u9875\u4ee5\u53ca\u6bcf\u9875\u7684\u6570\u636e\u91cf\uff0c\u540c\u65f6\u8981\u6ce8\u610f\u4e00\u4e0b\u662f\u5426\u8d85\u51fa\u4e86\u6700\u5927\u9875\u6570\u3002\u4ee5\u6bcf\u987510\u6761\u4e3a\u4f8b\uff0c\u5219\u524d\u4e09\u9875\u7684\u6570\u636e\u5e94\u4e3a\uff1a<\/p>\n
              \n
            • \u7b2c1\u9875\uff1a\u7b2c1~10\u6761\uff0cSQL\u5199\u6cd5\uff1aLIMIT 0,10<\/li>\n
            • \u7b2c2\u9875\uff1a\u7b2c11~20\u6761\uff0cSQL\u5199\u6cd5\uff1aLIMIT 10,10<\/li>\n
            • \u7b2c3\u9875\uff1a\u7b2c21~30\u6761\uff0cSQL\u5199\u6cd5\uff1aLIMIT 20,10<\/li>\n<\/ul>\n
              \u636e\u6b64\u6211\u4eec\u53ef\u4ee5\u603b\u7ed3\u51fa\uff0cLIMIT\u6240\u9700\u8981\u7684\u4e24\u4e2a\u53c2\u6570\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n
                \n
              • offset\uff1a(pageNumber - 1) * pageSize<\/li>\n
              • rows\uff1apageSize<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
                \u4f7f\u7528MySQL\u5b9e\u73b0\u5206\u9875\u67e5\u8be2 \u5728\u9879\u76ee\u5f00\u53d1\u5f53\u4e2d\uff0c\u7ecf\u5e38\u8981\u5b9e\u73b0\u5206\u9875\u529f\u80fd\uff0c\u5728\u9762\u8bd5\u65f6\u4e5f\u4f1a\u7ecf\u5e38\u88ab\u95ee\u5230\uff0c\u4ec0\u4e48\u662f\u5206\u9875\u3002\u8fd9\u662f\u56e0\u4e3a\u5728\u4e00\u4e2a\u9875\u9762\u4e0a\u80fd\u591f\u663e\u793a\u7684\u6570\u636e\u662f   \u2026 …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[23],"tags":[24],"_links":{"self":[{"href":"\/index.php?rest_route=\/wp\/v2\/posts\/1351"}],"collection":[{"href":"\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1351"}],"version-history":[{"count":2,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/1351\/revisions"}],"predecessor-version":[{"id":1353,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/1351\/revisions\/1353"}],"wp:attachment":[{"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1351"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1351"},{"taxonomy":"post_tag","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1351"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}