{"id":7738,"date":"2021-08-23T11:16:31","date_gmt":"2021-08-23T03:16:31","guid":{"rendered":"https:\/\/www.gbase8.cn\/?p=7738"},"modified":"2025-03-04T09:47:27","modified_gmt":"2025-03-04T01:47:27","slug":"gbase-8a%e9%92%88%e5%af%b9%e7%b2%be%e7%a1%ae%e6%9f%a5%e8%af%a2%e4%b8%9a%e5%8a%a1%e7%9a%84%e4%bc%98%e5%8c%96%e6%89%8b%e6%ae%b5%e6%b1%87%e6%80%bb","status":"publish","type":"post","link":"https:\/\/www.gbase8.cn\/en\/7738","title":{"rendered":"\u5357\u5927\u901a\u7528GBase 8a\u9488\u5bf9\u7cbe\u786e\u67e5\u8be2\u4e1a\u52a1\u7684\u4f18\u5316\u624b\u6bb5\u6c47\u603b"},"content":{"rendered":"<p>\u672c\u6587\u9488\u5bf9GBase 8a \u5728\u6700\u7b80\u5355\u7684\u7cbe\u786e\u67e5\u8be2\u573a\u666f\u4e0b\uff0c\u5df2\u77e5\u7684\u4f18\u5316\u624b\u6bb5\u8fdb\u884c\u6c47\u603b\uff0c\u5305\u62ecHash\u5206\u5e03\uff0cglobal hash\u7d22\u5f15\uff0c\u884c\u5b58\u5217\uff0c\u5e76\u884c\u7269\u5316\uff0c\u9884\u6392\u5e8f\u3001hash\/key\u5206\u533a\u7b49\u3002\u540e\u7eed\u5982\u6709\u66f4\u591a\u7684\u65b9\u6cd5\u4f1a\u9010\u6e10\u8865\u5145\u3002<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Directory Navigation<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a2b2c877ad2c\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a2b2c877ad2c\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#%E5%8F%82%E8%80%83\" >\u53c2\u8003<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#%E7%B2%BE%E7%A1%AE%E6%9F%A5%E8%AF%A2\" >\u7cbe\u786e\u67e5\u8be2<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#%E4%BC%98%E5%8C%96%E5%88%86%E6%9E%90\" >\u4f18\u5316\u5206\u6790<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#%E5%AE%9A%E4%BD%8D%E9%98%B6%E6%AE%B5\" >\u5b9a\u4f4d\u9636\u6bb5<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#global_hash%E7%B4%A2%E5%BC%95\" >global hash\u7d22\u5f15<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#%E9%A2%84%E6%8E%92%E5%BA%8F\" >\u9884\u6392\u5e8f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#hashkey_%E5%88%86%E5%8C%BA\" >hash\/key \u5206\u533a<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#%E8%BF%94%E5%9B%9E%E7%BB%93%E6%9E%9C%E9%98%B6%E6%AE%B5\" >\u8fd4\u56de\u7ed3\u679c\u9636\u6bb5<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#%E8%A1%8C%E5%AD%98%E5%88%97\" >\u884c\u5b58\u5217<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#%E5%B9%B6%E8%A1%8C%E7%89%A9%E5%8C%96\" >\u5e76\u884c\u7269\u5316<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#%E9%A2%84%E6%8E%92%E5%BA%8F-2\" >\u9884\u6392\u5e8f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#hashkey_%E5%88%86%E5%8C%BA-2\" >hash\/key \u5206\u533a<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#Hash%E5%88%86%E5%B8%83%E5%88%97%E9%80%89%E6%8B%A9\" >Hash\u5206\u5e03\u5217\u9009\u62e9<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#%E4%BD%8E%E5%B9%B6%E5%8F%91\" >\u4f4e\u5e76\u53d1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#%E9%AB%98%E5%B9%B6%E5%8F%91\" >\u9ad8\u5e76\u53d1<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.gbase8.cn\/en\/7738\/#%E5%B8%A6limit%E7%9A%84%E7%B2%BE%E7%A1%AE%E6%9F%A5%E8%AF%A2\" >\u5e26limit\u7684\u7cbe\u786e\u67e5\u8be2<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%8F%82%E8%80%83\"><\/span>\u53c2\u8003<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><a href=\"https:\/\/www.gbase8.cn\/en\/7695\/\">GBase 8a\u7684Global hash\u7d22\u5f15\u67e5\u8be2\u6027\u80fd\u63d0\u5347\u6d4b\u8bd5<\/a><br><a href=\"https:\/\/www.gbase8.cn\/en\/7703\/\">GBase 8a\u5e76\u884c\u7269\u5316\u8fd4\u56de\u7ed3\u679c\u96c6\u7684\u53c2\u6570gbase_parallel_threshold<\/a><br><a href=\"https:\/\/www.gbase8.cn\/en\/7701\/\">GBase 8a\u7684\u884c\u5b58\u5217grouped\u6027\u80fd\u63d0\u5347\u6d4b\u8bd5<\/a><br><a href=\"https:\/\/www.gbase8.cn\/en\/1075\/\">GBase 8a \u901a\u8fc7first_rows\u7684<mark>hint<\/mark>\u63d0\u9ad8\u5e26<mark>limit<\/mark>\u7684\u7b80\u5355\u67e5\u8be2\u6027\u80fd<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%B2%BE%E7%A1%AE%E6%9F%A5%E8%AF%A2\"><\/span>\u7cbe\u786e\u67e5\u8be2<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6307\u7b49\u503c\u7684\u67e5\u8be2\uff0c\u6bd4\u5982\u67e5\u8be22021\u5e748\u67088\u65e5\u7684\u5929\u8868\uff0c\u4e3b\u53eb\u53f7\u7801\u4e3a13912345678\u7684\u901a\u8bdd\u8bb0\u5f55\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>select * from MyTable_20210808 where calling_number=13912345678;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%BC%98%E5%8C%96%E5%88%86%E6%9E%90\"><\/span>\u4f18\u5316\u5206\u6790<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u8fd9\u7c7b\u67e5\u8be2\u5206\u62102\u4e2a\u9636\u6bb5\u5206\u6790\uff0c\u5176\u4e2d<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5b9a\u4f4d\u9636\u6bb5\u8d1f\u8d23\u6839\u636e\u67e5\u8be2\u5217\uff0c\u627e\u5230\u7b26\u5408\u8981\u6c42\u7684\u6570\u636e\u884c\uff1b<\/li><li>\u6839\u636e\u6570\u636e\u884c\uff0c\u8bfb\u53d6\u3010\u6574\u884c\u6570\u636e\u3011\uff0c\u5e76\u8fd4\u56de\u7ed3\u679c\u3002<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%AE%9A%E4%BD%8D%E9%98%B6%E6%AE%B5\"><\/span>\u5b9a\u4f4d\u9636\u6bb5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u8d1f\u8d23\u6839\u636e\u6307\u5b9a\u6761\u4ef6\uff0c\u627e\u5230\u54ea\u4e9b\u6570\u636e\u884c\uff0c\u7b26\u5408\u6761\u4ef6\u8981\u6c42\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"global_hash%E7%B4%A2%E5%BC%95\"><\/span>global hash\u7d22\u5f15<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>\u4e00\u822c\u90fd\u662f\u901a\u8fc7\u7d22\u5f15\u7684\u65b9\u5f0f\u6765\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n\n\n\n<p>GBase 8a\u662f\u901a\u8fc7hash\u7d22\u5f15\u6765\u4f18\u5316\u8fd9\u90e8\u5206\u3002\u8be5\u7d22\u5f15\u9002\u5408\u91cd\u590d\u5ea6\u4f4e\u7684\u6570\u636e\u5217\uff0c\u6bd4\u5982\u7535\u8bdd\u53f7\u7801\uff0c\u8eab\u4efd\u8bc1\u53f7\u7b49\u3002\u800c\u5bf9\u4e8e\u91cd\u590d\u5ea6\u9ad8\u7684\uff0c\u6bd4\u5982\u6c11\u65cf\uff0c\u5730\u533a\u7b49\uff0c\u5219\u3010\u53ef\u80fd\u3011\u6027\u80fd\u964d\u4f4e\u3002 \u4e00\u822c\u53ef\u4ee5\u8bc4\u4f30\uff0c\u4f4e\u4e8e\u5343\u5206\u4e4b1\u7684\uff0c\u53ef\u4ee5\u8ba4\u4e3a\u91cd\u590d\u5ea6\u4f4e\u3002\u5177\u4f53\u7684\u53ef\u4ee5\u5b9e\u9645\u6d4b\u8bd5\u4e3a\u51c6\u3002<\/p>\n\n\n\n<p>\u8be6\u60c5\u53c2\u8003 <a href=\"https:\/\/www.gbase8.cn\/en\/7695\/\">GBase 8a\u7684Global hash\u7d22\u5f15\u67e5\u8be2\u6027\u80fd\u63d0\u5347\u6d4b\u8bd5<\/a> <\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E9%A2%84%E6%8E%92%E5%BA%8F\"><\/span>\u9884\u6392\u5e8f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>\u901a\u8fc7\u5bf9\u67e5\u8be2\u5217\u7684\u6392\u5e8f\uff0c\u53ef\u4ee5\u63d0\u9ad8\u3010\u667a\u80fd\u7d22\u5f15\u3011\u7684\u547d\u4e2d\u7387\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"hashkey_%E5%88%86%E5%8C%BA\"><\/span>hash\/key \u5206\u533a<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>\u901a\u8fc7hash\/key\u5206\u533a\uff0c\u5c06\u76f8\u540c\u7684\u503c\u653e\u5230\u4e00\u4e2a\u5206\u533a\u91cc\uff0c\u53ef\u4ee5\u6781\u5927\u51cf\u5c11\u626b\u63cf\u7684\u6570\u636e\u91cf\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%BF%94%E5%9B%9E%E7%BB%93%E6%9E%9C%E9%98%B6%E6%AE%B5\"><\/span>\u8fd4\u56de\u7ed3\u679c\u9636\u6bb5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u5bf9\u4e8e\u4f20\u7edf\u7684\u884c\u5b58\u6570\u636e\u5e93\uff0c\u53ea\u8981\u5b9a\u4f4d\u5230\u884c\uff0c\u5c31\u53ef\u4ee5\u5feb\u901f\u7684\u8bfb\u53d6\u5230\u6574\u884c\u6570\u636e\uff1b\u800c\u5bf9\u4e8e\u5217\u5b58\u6570\u636e\u5e93\uff0c\u5219\u9700\u8981\u8003\u8651\uff0c\u5982\u4f55\u51cf\u5c11\u62fc\u51d1\u4e0d\u540c\u5217\u5230\u4e00\u884c\u7684\u95ee\u9898\u3002\u5217\u8d8a\u591a\uff0c\u62fc\u51d1\u7684\u4ee3\u4ef7\u8d8a\u5927\u3002\u5728GBase 8a\u91cc\uff0c\u8fd9\u90e8\u5206\u53eb\u3010\u7269\u5316\u3011\uff08Materialization\uff09\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%A1%8C%E5%AD%98%E5%88%97\"><\/span>\u884c\u5b58\u5217<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>GBase \u53ef\u4ee5\u901a\u8fc7\u884c\u5b58\u5217\u65b9\u5f0f\uff0c\u7528\u7a7a\u95f4\u6362\u65f6\u95f4\uff0c\u63d0\u9ad8\u8fd9\u4e2a\u9636\u6bb5\u7684\u6548\u7387\uff0c\u8be6\u60c5\u53ef\u4ee5\u53c2\u8003  <a href=\"https:\/\/www.gbase8.cn\/en\/7701\/\"><\/a><a href=\"https:\/\/www.gbase8.cn\/en\/7701\/\">GBase 8a\u7684\u884c\u5b58\u5217grouped\u6027\u80fd\u63d0\u5347\u6d4b\u8bd5<\/a><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%B9%B6%E8%A1%8C%E7%89%A9%E5%8C%96\"><\/span>\u5e76\u884c\u7269\u5316<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>\u53e6\u5916\uff0c\u5728\u5c11\u91cf\u67e5\u8be2\uff0c\u975e\u9ad8\u5e76\u53d1\u573a\u666f\uff0c\u4e5f\u5c31\u662f\u78c1\u76d8\u8d44\u6e90\u4e0d\u662f\u6781\u7aef\u4e89\u62a2\u7684\u573a\u666f\u4e0b\uff0c\u53ef\u4ee5\u8003\u8651\u5e76\u884c\u7269\u5316\u53c2\u6570\u7684\u5f71\u54cd\uff0c\u5f53\u8fd4\u56de\u7ed3\u679c\u96c6\u5c11\uff0c\u4e14\u4e14\u8d44\u6e90\u4e89\u62a2\u4e0d\u9ad8\u65f6\uff0c\u53ef\u4ee5\u9002\u5f53\u8c03\u6574\u8be5\u53c2\u6570\uff0c\u505a\u5e76\u884c\u7269\u5316\u3002<a href=\"https:\/\/www.gbase8.cn\/en\/7703\/\">GBase 8a\u5e76\u884c\u7269\u5316\u8fd4\u56de\u7ed3\u679c\u96c6\u7684\u53c2\u6570gbase_parallel_threshold<\/a><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E9%A2%84%E6%8E%92%E5%BA%8F-2\"><\/span>\u9884\u6392\u5e8f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>\u5982\u679c\u6570\u636e\u662f\u6309\u7167\u67e5\u8be2\u5217\u6392\u5e8f\u7684\uff0c\u90a3\u4e48\u5176\u547d\u4e2d\u7684\u6570\u636e\uff0c\u5c06\u662f\u8fde\u7eed\u7684\uff0c\u5982\u6b64\u78c1\u76d8\u6d88\u8017\u5c06\u4f1a\u964d\u4f4e\u5230\u6700\u5c0f\uff0c\u6781\u5927\u63d0\u9ad8\u6027\u80fd\u3002 \u4f46\u662f\u6392\u5e8f\u662f\u9700\u8981\u65f6\u95f4\u7684\uff0c\u8de8\u5ea6\u8d8a\u5927\uff0c\u867d\u7136\u6027\u80fd\u8d8a\u597d\uff0c\u4f46\u6392\u5e8f\u65f6\u95f4\u4e5f\u8d8a\u957f\u3002\u53e6\u5916\uff0c\u540c\u4e00\u4e2a\u8868\uff0c\u4e5f\u6700\u591a\u67091\u4e2a\u6392\u5e8f\u5217\u3002<\/p>\n\n\n\n<p>\u5728\u67d0\u4e9b\u573a\u666f\uff0c\u8fd9\u4e5f\u662f\u4e00\u4e2a\u3010\u53ef\u9009\u9879\u3011\uff0c\u7279\u522b\u662f\u9488\u5bf9\u3010\u5386\u53f2\u6570\u636e\u3011\uff0c\u5165\u5e93\u4e00\u6b21\uff0c\u4f1a\u67e5\u5f88\u591a\u6b21\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"hashkey_%E5%88%86%E5%8C%BA-2\"><\/span>hash\/key \u5206\u533a<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>\u901a\u8fc7hash\/key\u5206\u533a\uff0c\u5c06\u76f8\u540c\u7684\u503c\u653e\u5230\u4e00\u4e2a\u5206\u533a\u91cc\uff0c\u6570\u636e\u76f8\u5bf9\u96c6\u4e2d\uff0c\u5927\u6982\u7387\u80fd\u51cf\u5c11\u7269\u5316\u8017\u65f6\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Hash%E5%88%86%E5%B8%83%E5%88%97%E9%80%89%E6%8B%A9\"><\/span>Hash\u5206\u5e03\u5217\u9009\u62e9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u662f\u5426\u5bf9\u67e5\u8be2\u5217\u505ahash\u5206\u5e03\uff0c\u53d6\u51b3\u4e8e\u67e5\u8be2\u5e76\u53d1\u6570\u3002\u5907\u6ce8\uff1ahash\u5206\u5e03\u540e\uff0c\u76f8\u540c\u6761\u4ef6\u7684\u6570\u636e\u5c06\u843d\u5728\u540c\u4e00\u8282\u70b9\u4e0a\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%BD%8E%E5%B9%B6%E5%8F%91\"><\/span>\u4f4e\u5e76\u53d1<span 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class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%B8%A6limit%E7%9A%84%E7%B2%BE%E7%A1%AE%E6%9F%A5%E8%AF%A2\"><\/span>\u5e26limit\u7684\u7cbe\u786e\u67e5\u8be2<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u8bf7\u53c2\u8003 <a href=\"https:\/\/www.gbase8.cn\/en\/1075\/\">GBase 8a \u901a\u8fc7first_rows\u7684<mark>hint<\/mark>\u63d0\u9ad8\u5e26<mark>limit<\/mark>\u7684\u7b80\u5355\u67e5\u8be2\u6027\u80fd<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u9488\u5bf9GBase 8a \u5728\u6700\u7b80\u5355\u7684\u7cbe\u786e\u67e5\u8be2\u573a\u666f\u4e0b\uff0c\u5df2\u77e5\u7684\u4f18\u5316\u624b\u6bb5\u8fdb\u884c\u6c47\u603b\uff0c\u5305\u62ecHash\u5206\u5e03\uff0cglobal 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