{"id":5526,"date":"2024-11-14T11:08:57","date_gmt":"2024-11-14T03:08:57","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5526\/"},"modified":"2024-11-14T11:08:57","modified_gmt":"2024-11-14T03:08:57","slug":"mysql-number%e7%b1%bb%e5%9e%8b%e6%80%8e%e4%b9%88%e5%86%99","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5526\/","title":{"rendered":"mysql\u00a0number\u7c7b\u578b\u600e\u4e48\u5199"},"content":{"rendered":"<blockquote><p>\n  mysql \u4e2d\u7684 number \u7c7b\u578b\u7528\u4e8e\u5b58\u50a8\u56fa\u5b9a\u7cbe\u5ea6\u7684\u5341\u8fdb\u5236\u6570\u5b57\uff0c\u7531\u4ee5\u4e0b\u65b9\u9762\u5b9a\u4e49\uff1a\u603b\u4f4d\u6570\u548c\u6307\u5b9a\u5c0f\u6570\u70b9\u540e\u4f4d\u6570\u56fa\u5b9a\u7cbe\u5ea6\uff0c\u8fd9\u610f\u5473\u7740\u5c0f\u6570\u70b9\u4f4d\u7f6e\u56fa\u5b9a\u4e14\u5728\u503c\u4e2d\u660e\u786e\u6307\u5b9a\u5e38\u7528\u4e8e\u5b58\u50a8\u9700\u8981\u56fa\u5b9a\u7cbe\u5ea6\u7684\u8d27\u5e01\u3001\u5229\u7387\u7b49\u8d22\u52a1\u6570\u636e\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202405\/29\/2024052907572478601.jpg\" class=\"aligncenter\" title=\"mysql\u00a0number\u7c7b\u578b\u600e\u4e48\u5199\u63d2\u56fe\" alt=\"mysql\u00a0number\u7c7b\u578b\u600e\u4e48\u5199\u63d2\u56fe\" \/><\/p>\n<p><strong>MySQL NUMBER\u7c7b\u578b<\/strong><\/p>\n<p>MySQL \u4e2d\u7684 NUMBER \u7c7b\u578b\u7528\u4e8e\u5b58\u50a8\u56fa\u5b9a\u7cbe\u5ea6\u7684\u5341\u8fdb\u5236\u6570\u5b57\u3002\u5b83\u662f\u4e00\u4e2a\u5b9a\u70b9\u6570\u636e\u7c7b\u578b\uff0c\u8fd9\u610f\u5473\u7740\u5c0f\u6570\u70b9\u7684\u4f4d\u7f6e\u662f\u56fa\u5b9a\u7684\uff0c\u5e76\u4e14\u5728\u503c\u4e2d\u663e\u5f0f\u6307\u5b9a\u3002<\/p>\n<p><strong>\u8bed\u6cd5<\/strong><\/p>\n<p>NUMBER \u7c7b\u578b\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u5b9a\u4e49\uff1a<\/p>\n<pre>NUMBER[(p,s)]<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li> <strong>p<\/strong> \u8868\u793a\u6570\u5b57\u7684\u603b\u4f4d\u6570\uff0c\u5305\u62ec\u5c0f\u6570\u70b9\u540e\u7684\u4f4d\u6570\u3002<\/li>\n<li> <strong>s<\/strong> \u8868\u793a\u5c0f\u6570\u70b9\u540e\u7684\u4f4d\u6570\u3002<\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b<\/strong><\/p>\n<p>\u8981\u58f0\u660e\u4e00\u4e2a\u4f4d\u6570\u4e3a 10\uff0c\u5c0f\u6570\u70b9\u540e 2 \u4f4d\u7684 NUMBER \u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n<pre>NUMBER(10,2)<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u7279\u70b9<\/strong><\/p>\n<ul>\n<li> <strong>\u56fa\u5b9a\u7cbe\u5ea6\uff1a<\/strong>NUMBER \u7c7b\u578b\u7684\u7cbe\u5ea6\u662f\u56fa\u5b9a\u7684\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u53ef\u4ee5\u7cbe\u786e\u5b58\u50a8\u6307\u5b9a\u6570\u91cf\u7684\u6570\u5b57\u3002<\/li>\n<li> <strong>\u5b9a\u70b9\uff1a<\/strong>\u5c0f\u6570\u70b9\u7684\u4f4d\u7f6e\u662f\u56fa\u5b9a\u7684\uff0c\u5e76\u4e14\u5728\u503c\u4e2d\u663e\u5f0f\u6307\u5b9a\u3002<\/li>\n<li> <strong>\u8303\u56f4\uff1a<\/strong>NUMBER \u7c7b\u578b\u7684\u8303\u56f4\u53d7\u5176\u7cbe\u5ea6\u548c\u4f4d\u6570\u7684\u9650\u5236\u3002<\/li>\n<\/ul>\n<p><strong>\u7528\u9014<\/strong><\/p>\n<p>NUMBER \u7c7b\u578b\u901a\u5e38\u7528\u4e8e\u5b58\u50a8\u9700\u8981\u56fa\u5b9a\u7cbe\u5ea6\u7684\u8d27\u5e01\u503c\u3001\u5229\u7387\u6216\u5176\u4ed6\u8d22\u52a1\u6570\u636e\u3002<\/p>\n<p><strong>\u4e0e DECIMAL \u7c7b\u578b\u7684\u533a\u522b<\/strong><\/p>\n<p>NUMBER \u548c DECIMAL \u6570\u636e\u7c7b\u578b\u5728 MySQL \u4e2d\u975e\u5e38\u76f8\u4f3c\u3002\u5b83\u4eec\u90fd\u662f\u7528\u4e8e\u5b58\u50a8\u5341\u8fdb\u5236\u6570\u5b57\u7684\u5b9a\u70b9\u6570\u636e\u7c7b\u578b\u3002\u7136\u800c\uff0c\u5b83\u4eec\u4e4b\u95f4\u5b58\u5728\u4e00\u4e9b\u5173\u952e\u533a\u522b\uff1a<\/p>\n<ul>\n<li> <strong>\u7cbe\u5ea6\uff1a<\/strong>NUMBER \u7c7b\u578b\u7684\u7cbe\u5ea6\u662f\u56fa\u5b9a\u7684\uff0c\u800c DECIMAL \u7c7b\u578b\u7684\u7cbe\u5ea6\u53ef\u4ee5\u52a8\u6001\u53d8\u5316\u3002<\/li>\n<li> <strong>\u5c0f\u6570\u70b9\uff1a<\/strong>NUMBER \u7c7b\u578b\u7684\u5c0f\u6570\u70b9\u4f4d\u7f6e\u662f\u56fa\u5b9a\u7684\uff0c\u800c DECIMAL \u7c7b\u578b\u7684\u70b9\u4f4d\u7f6e\u53ef\u4ee5\u6839\u636e\u9700\u8981\u79fb\u52a8\u3002<\/li>\n<\/ul>\n<p>\u5728\u9700\u8981\u56fa\u5b9a\u7cbe\u5ea6\u7684\u60c5\u51b5\u4e0b\uff0c\u5e94\u4f7f\u7528 NUMBER \u7c7b\u578b\u3002\u5728\u9700\u8981\u52a8\u6001\u7cbe\u5ea6\u6216\u5c0f\u6570\u70b9\u4f4d\u7f6e\u53ef\u4ee5\u66f4\u6539\u7684\u60c5\u51b5\u4e0b\uff0c\u5e94\u4f7f\u7528 DECIMAL \u7c7b\u578b\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f&nbsp;number\u7c7b\u578b\u600e\u4e48\u5199\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>mysql \u4e2d\u7684 number 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\u5176\u4e2d\uff1a p \u8868\u793a\u6570\u5b57\u7684\u603b\u4f4d\u6570\uff0c\u5305\u62ec\u5c0f\u6570\u70b9\u540e\u7684\u4f4d\u6570\u3002 s \u8868\u793a\u5c0f\u6570\u70b9\u540e\u7684\u4f4d\u6570\u3002 \u793a\u4f8b \u8981\u58f0\u660e\u4e00\u4e2a\u4f4d\u6570\u4e3a 10\uff0c\u5c0f\u6570\u70b9\u540e 2 \u4f4d\u7684 NUMBER \u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a NUMBER(10,2) \u767b\u5f55\u540e\u590d\u5236 \u7279\u70b9 \u56fa\u5b9a\u7cbe\u5ea6\uff1aNUMBER \u7c7b\u578b\u7684\u7cbe\u5ea6\u662f\u56fa\u5b9a\u7684\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u53ef\u4ee5\u7cbe\u786e\u5b58\u50a8\u6307\u5b9a\u6570\u91cf\u7684\u6570\u5b57\u3002 \u5b9a\u70b9\uff1a\u5c0f\u6570\u70b9\u7684\u4f4d\u7f6e\u662f\u56fa\u5b9a\u7684\uff0c\u5e76\u4e14\u5728\u503c\u4e2d\u663e\u5f0f\u6307\u5b9a\u3002 \u8303\u56f4\uff1aNUMBER \u7c7b\u578b\u7684\u8303\u56f4\u53d7\u5176\u7cbe\u5ea6\u548c\u4f4d\u6570\u7684\u9650\u5236\u3002 \u7528\u9014 NUMBER 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