{"id":42112,"date":"2023-09-30T20:39:34","date_gmt":"2023-10-24T02:32:55","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8postgresql%e4%b8%ad%ef%bc%8chaving%e5%ad%90%e5%8f%a5%e7%9a%84%e5%88%ab%e5%90%8d%e3%80%82\/"},"modified":"2024-01-15T11:17:54","modified_gmt":"2024-01-15T03:17:54","slug":"%e5%9c%a8postgresql%e4%b8%ad%ef%bc%8chaving%e5%ad%90%e5%8f%a5%e7%9a%84%e5%88%ab%e5%90%8d%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8postgresql%e4%b8%ad%ef%bc%8chaving%e5%ad%90%e5%8f%a5%e7%9a%84%e5%88%ab%e5%90%8d%e3%80%82\/","title":{"rendered":"\u5728PostgreSQL\u4e2d\uff0chaving\u5b50\u53e5\u7684\u522b\u540d"},"content":{"rendered":"<h1>\u5728 MySQL \u4e2d\u672c\u5e94\u53ef\u7528\u7684 having \u5b50\u53e5\u7684\u522b\u540d\u5374\u65e0\u6cd5\u4f7f\u7528\u3002<\/h1>\n<p>\u5728PostgreSQL\u4e2d\uff0c\u4e0d\u80fd\u5728SELECT\u8bed\u53e5\u7684HAVING\u5b50\u53e5\u4e2d\u4f7f\u7528\u522b\u540d\u3002<\/p>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">SELECT<\/span>\r\n    <span class=\"n\">status<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"k\">count<\/span><span class=\"p\">(<\/span><span class=\"o\">*<\/span><span class=\"p\">)<\/span> <span class=\"k\">AS<\/span> <span class=\"n\">status_count<\/span>\r\n<span class=\"k\">FROM<\/span>\r\n    <span class=\"n\">Users<\/span>\r\n<span class=\"k\">GROUP<\/span> <span class=\"k\">BY<\/span> <span class=\"n\">status<\/span>\r\n<span class=\"k\">HAVING<\/span> <span class=\"n\">status_count<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u5728PostgreSQL\u4e2d\uff0cHAVING\u5b50\u53e5\u5728\u6267\u884c\u987a\u5e8f\u4e0a\u4f18\u5148\u4e8eSELECT\u5b50\u53e5\u8fdb\u884c\u8bc4\u4f30\u3002<br \/>\n\u56e0\u6b64\uff0c\u5728PostgreSQL\u4e2d\u9700\u8981\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u7f16\u5199\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">SELECT<\/span>\r\n    <span class=\"n\">status<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"k\">count<\/span><span class=\"p\">(<\/span><span class=\"o\">*<\/span><span class=\"p\">)<\/span> <span class=\"k\">AS<\/span> <span class=\"n\">status_count<\/span>\r\n<span class=\"k\">FROM<\/span>\r\n    <span class=\"nv\">\"Users\"<\/span>\r\n<span class=\"k\">GROUP<\/span> <span class=\"k\">BY<\/span> <span class=\"n\">status<\/span>\r\n<span class=\"k\">HAVING<\/span> <span class=\"k\">count<\/span><span class=\"p\">(<\/span><span class=\"o\">*<\/span><span class=\"p\">)<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u6211\u6ce8\u610f\u5230\u540c\u4e00\u4e2acount(*)\u88ab\u91cd\u590d\u5199\u4e86\u4e24\u6b21\uff0c\u611f\u5230\u56f0\u6270\u3002<br \/>\n\u5f53count(*)\u7684\u90e8\u5206\u53d8\u6210\u66f4\u590d\u6742\u7684\u8ba1\u7b97\u5f0f\u6216\u6761\u4ef6\u5206\u652f\u65f6\uff0c\u53ef\u80fd\u4f1a\u53d8\u5f97\u5197\u957f\u3002<\/p>\n<h2>\u53ef\u4ee5\u6f02\u4eae\u5730\u5199<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">WITH<\/span> <span class=\"n\">user_status_counts<\/span> <span class=\"k\">as<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"k\">SELECT<\/span>\r\n        <span class=\"n\">status<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"k\">count<\/span><span class=\"p\">(<\/span><span class=\"o\">*<\/span><span class=\"p\">)<\/span> <span class=\"k\">AS<\/span> <span class=\"n\">status_count<\/span>\r\n    <span class=\"k\">FROM<\/span>\r\n        <span class=\"nv\">\"Users\"<\/span>\r\n    <span class=\"k\">GROUP<\/span> <span class=\"k\">BY<\/span> <span class=\"n\">status<\/span>\r\n<span class=\"p\">)<\/span>\r\n<span class=\"k\">SELECT<\/span> <span class=\"o\">*<\/span> <span class=\"k\">from<\/span> <span class=\"n\">user_status_counts<\/span> <span class=\"n\">usc<\/span> <span class=\"k\">WHERE<\/span> <span class=\"n\">usc<\/span><span class=\"p\">.<\/span><span class=\"n\">status_count<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u4f7f\u7528WITH\u7684\u8bdd\uff0ccount(*)\u90a3\u90e8\u5206\u5e94\u8be5\u53ef\u4ee5\u5728\u4e00\u6b21\u5185\u5c31\u5b8c\u6210\u3002<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 MySQL \u4e2d\u672c\u5e94\u53ef\u7528\u7684 having \u5b50\u53e5\u7684\u522b\u540d\u5374\u65e0\u6cd5\u4f7f\u7528\u3002 \u5728PostgreSQL\u4e2d\uff0c\u4e0d\u80fd\u5728SELEC [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-42112","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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