{"id":874,"date":"2017-08-27T21:28:28","date_gmt":"2017-08-27T13:28:28","guid":{"rendered":"http:\/\/www.5x44.cn\/?p=874"},"modified":"2017-08-27T21:28:28","modified_gmt":"2017-08-27T13:28:28","slug":"mysql%e4%b8%9a%e5%8a%a1%e4%bc%98%e5%8c%96%e4%b8%8e%e8%ae%be%e8%ae%a1","status":"publish","type":"post","link":"https:\/\/www.5x44.cn\/?p=874","title":{"rendered":"Mysql\u4e1a\u52a1\u4f18\u5316\u4e0e\u8bbe\u8ba1"},"content":{"rendered":"<p>\u4e00\u3001\u57fa\u4e8e\u6027\u80fd\u7684\u8868\u8bbe\u8ba1<\/p>\n<ol>\n<li>\u6839\u636e\u67e5\u8be2\u8bbe\u8ba1\u597d\u7d22\u5f15<\/li>\n<li>\u6839\u636e\u6838\u5fc3\u67e5\u8be2\u9700\u6c42\uff0c\u9002\u5f53\u8c03\u6574\u8868\u7ed3\u6784<\/li>\n<li>\u57fa\u4e8e\u4e00\u4e9b\u7279\u6b8a\u4e1a\u52a1\u8981\u6c42\u8c03\u6574\u5b9e\u73b0\u65b9\u5f0f<\/li>\n<\/ol>\n<p>\u4e8c\u3001\u53cd\u8303\u5f0f\uff0c\u5197\u4f59\u5fc5\u8981\u5b57\u6bb5<\/p>\n<ul>\n<li>\u9488\u5bf9\u6838\u5fc3sql\u4fdd\u7559\u67e5\u8be2\u7ed3\u679c\u6240\u5fc5\u987b\u7684\u5197\u4f59\u5b57\u6bb5\uff0c\u907f\u514d\u9891\u7e41JOIN\u64cd\u4f5c\uff1b\uff08\u6839\u636e\u8303\u5f0f\u8981\u6c42\u8bbe\u8ba1\u7684\u8868\u5b57\u6bb5\uff0c\u5728\u5b9e\u9645\u67e5\u8be2\u65f6\u53ef\u80fd\u8981\u67e5\u627e\u5230\u4e24\u4e2a\u8868\u624d\u80fd\u627e\u5230\uff0c\u6211\u4eec\u6240\u8981\u7684\u7ed3\u679c\uff0c\u8fd9\u6837\u67e5\u4e24\u4e2a\u8868\u7684\u4ee3\u4ef7\u6bd4\u8f83\u9ad8\uff0c\u6240\u4ee5\u6709\u65f6\u53ef\u4ee5\u505a\u5fc5\u8981\u7684\u66f4\u6539\uff0c\u628a\u6838\u5fc3SQL\u8981\u7528\u7684\u7ed3\u679c\u653e\u5230\u4e00\u4e2a\u8868\u4e2d\u3002\u8fd8\u6709\u5c31\u662f\u81ea\u52a8\u9012\u589e\u5b57\u6bb5\u505a\u4e3a\u4e3b\u952e\u4e5f\u662f\u8303\u5f0f\u5197\u4f59\u7684\uff0c\u4e0d\u8fc7\u8fd9\u6837\u505a\u53ef\u4ee5\u51cf\u5c11insert\u65f6\u95f4\uff1b\u8868\u4e2d\u589e\u52a0\u66f4\u65b0\u65f6\u95f4\u5b57\u6bb5\u4f7f\u7528timestamp\u7c7b\u578b\uff0c\u53ef\u4ee5\u6709\u52a9\u4e8e\u65e5\u540e\u7684\u7ef4\u62a4\u64cd\u4f5c\u3002\uff09<\/li>\n<\/ul>\n<p>\u4e09\u3001\u62c6\u5206\u5927\u5b57\u6bb5<\/p>\n<ul>\n<li>\u62c6\u5206\u5927\u5b57\u6bb5\u5230\u5355\u72ec\u7684\u8868\u4e2d\uff0c\u907f\u514d\u8303\u56f4\u626b\u63cf\u4ee3\u4ef7\u589e\u5927\u3002\u5982\uff1a\u5c06\u535a\u6587\u8868\u62c6\u5206\u6210\u4e24\u4efd\u3002\u4e00\u4efd\u5305\u542b\u535a\u6587ID\u3001\u4e3b\u9898\u3001\u65f6\u95f4\u7b49\u4fe1\u606f\uff0c\u53e6\u4e00\u4efd\u5305\u542b\u535a\u6587ID\u548c\u6b63\u6587\u3002\u56e0\u4e3a\u4eba\u4eec\u5728\u770b\u535a\u5ba2\u65f6\u4f1a\u5148\u770b\u6807\u9898\u4fe1\u606f\uff0c\u53ea\u5bf9\u611f\u5174\u8da3\u7684\u6587\u7ae0\u624d\u4f1a\u70b9\u8fdb\u53bb\u770b\uff0c\u90fd\u5728\u4e00\u4e2a\u8868\u91cc\u7684\u8bdd\uff0c\u6bcf\u6b21\u67e5\u8be2\u90fd\u8981\u8bfb\u51fa\u6240\u6709\u5185\u5bb9\uff0cI\/O\u4ee3\u4ef7\u592a\u9ad8\u3002<\/li>\n<\/ul>\n<p>\u56db\u3001\u907f\u514d\u8fc7\u591a\u5b57\u6bb5\u6216\u8fc7\u957f\u884c<\/p>\n<ol>\n<li>\u884c\u8fc7\u957f\u5bfc\u81f4\u8868\u6570\u636e\u9875\u8bb0\u5f55\u53d8\u5c11\uff0c\u8303\u56f4\u626b\u63cf\u6027\u80fd\u964d\u4f4e\u3002<\/li>\n<li>\u4e00\u6b21\u4e5f\u6ca1\u6709\u5fc5\u8981\u83b7\u53d6\u90a3\u4e48\u591a\u5217\u7684\u6570\u636e<\/li>\n<li>\u66f4\u65b0\u6570\u636e\u9875\u4ee3\u4ef7\u589e\u52a0<\/li>\n<li>InnoDB\u662f\u805a\u7c07\u8868\uff0c\u6570\u5b57\u90fd\u5b58\u653e\u5728\u53f6\u8282\u70b9\u4e0a\uff0c\u6bcf\u4e2a16K\u9875\u6700\u5c11\u653e\u4e24\u884c\u6570\u636e\uff0c\u4e00\u822c\u4e00\u6761\u8bb0\u5f55\u8d85\u8fc78k\u7684\u90e8\u5206\u5c31\u4f1a\u53d1\u751f\u884c\u8fc1\u79fb\u3002<\/li>\n<\/ol>\n<p>\u4e94\u3001\u5206\u9875\u67e5\u8be2<\/p>\n<p>(1)\u907f\u514dlimit+offset\u8fc7\u5927<\/p>\n<ul>\n<li>\u56e0\u4e3aoffset\u8fc7\u5927\u7684\u8bdd\uff0c\u6570\u636e\u5e93\u8fd8\u662f\u4f1a\u5b9e\u9645\u626b\u63cf\u8fc7offset\u6761\u8bb0\u5f55\uff0c\u56e0\u4e3a\u6570\u636e\u5e93\u7684\u4f18\u5316\u5173\u952e\u70b9\u5c31\u662f\u964d\u4f4e\u6570\u636e\u626b\u63cf\u91cf\uff0c\u6240\u4ee5\u8fd9\u6837\u7684\u505a\u6cd5\u4e0d\u53ef\u53d6\u3002<\/li>\n<li>\u53d6\u800c\u4ee3\u4e4b\u7684\u662f\u4f7f\u7528\u81ea\u589e\u4e3b\u952eID\u6a21\u62df\u5206\u9875\uff1a\uff081\uff09\u7b2c\u4e00\u9875\u76f4\u63a5\u67e5\uff082\uff09\u83b7\u53d6\u7b2c\u4e00\u9875\u6700\u540e\u4e00\u884c\u7684ID\u503cmax(id)\uff083\uff09\u7b2c\u4e8c\u9875\u7528where 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More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37],"tags":[],"class_list":["post-874","post","type-post","status-publish","format-standard","hentry","category-mysql"],"_links":{"self":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/874","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=874"}],"version-history":[{"count":3,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/874\/revisions"}],"predecessor-version":[{"id":886,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/874\/revisions\/886"}],"wp:attachment":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=874"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=874"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=874"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}