{"id":34249,"date":"2023-06-13T10:57:45","date_gmt":"2023-06-13T02:57:45","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=34249"},"modified":"2023-07-31T00:32:35","modified_gmt":"2023-07-30T16:32:35","slug":"mysql%e6%80%8e%e4%b9%88%e6%9f%a5%e8%af%a2%e8%bf%9e%e7%bb%ad%e6%97%b6%e9%97%b4%e6%ae%b5%e7%9a%84%e6%9c%80%e5%a4%a7%e5%80%bc","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/34249.html","title":{"rendered":"mysql\u600e\u4e48\u67e5\u8be2\u8fde\u7eed\u65f6\u95f4\u6bb5\u7684\u6700\u5927\u503c"},"content":{"rendered":"
\n

\u6309\u4eea\u5668\u4e0e\u65f6\u95f4\uff08\u5904\u7406\u6210\u5c0f\u65f6\uff09group by\uff0c\u8ba1\u7b97\u503c\u7684\u6570\u91cf\u4e0e\u548c\uff0c\u518d\u6839\u636e\u7ed3\u679c\u5224\u65ad\u503c\u6570\u91cf\u662f\u5426\u6709\u7f3a\u5931\u503c\uff0c\u4ee5\u53ca\u548c\u7684\u6700\u5927\u503c\u3002\u9996\u5148\u8981\u660e\u786e\u91c7\u96c6\u6807\u51c6\uff0c\u6bd4\u5982\u8bf4\u4e00\u5206\u949f\u91c7\u96c6\u4e00\u6761\u8bb0\u5f55\uff0c\u90a3\u4e48\u53ef\u4ee5group by \u5c0f\u65f6\u3002<\/p>\n<\/blockquote>\n

\n
\"\"<\/figure>\n<\/div>\n

\u4e00\u3001mysql\u600e\u4e48\u67e5\u8be2\u8fde\u7eed\u65f6\u95f4\u6bb5\u7684\u6700\u5927\u503c<\/strong><\/h2>\n

\u6309\u4eea\u5668\u4e0e\u65f6\u95f4\uff08\u5904\u7406\u6210\u5c0f\u65f6\uff09group by\uff0c\u8ba1\u7b97\u503c\u7684\u6570\u91cf\u4e0e\u548c\uff0c\u518d\u6839\u636e\u7ed3\u679c\u5224\u65ad\u503c\u6570\u91cf\u662f\u5426\u6709\u7f3a\u5931\u503c\uff0c\u4ee5\u53ca\u548c\u7684\u6700\u5927\u503c\u3002\u9996\u5148\u8981\u660e\u786e\u91c7\u96c6\u6807\u51c6\uff0c\u6bd4\u5982\u8bf4\u4e00\u5206\u949f\u91c7\u96c6\u4e00\u6761\u8bb0\u5f55\uff0c\u90a3\u4e48\u53ef\u4ee5group by \u5c0f\u65f6\u3002<\/p>\n

\u2013 Step1 \u521b\u5efa\u8868<\/p>\n

CREATE TABLE monitor(<\/p>\n

id int not null auto_increment,<\/p>\n

seq_no int,<\/p>\n

add_time DATETIME,<\/p>\n

stat int,<\/p>\n

primary key(id)<\/p>\n

);<\/p>\n

\u2014 Step2 \u521d\u59cb\u5316\u8bb0\u5f55\uff0c\u8fd9\u91cc\u76846\u70b9\u548c7\u70b9\u7684\u6570\u636e\u5b8c\u6574\uff0c\u5176\u4e2d6\u70b9\u7684\u6709\u91cd\u590d\u8bb0\u5f55\u3002<\/p>\n

INSERT INTO monitor(seq_no,add_time,stat)<\/p>\n

SELECT 1,\u20192021-6-10 6:0\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:1\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:2\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:3\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:4\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:5\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:6\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:7\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:8\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:9\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:10\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:11\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:12\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:13\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:14\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:15\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:16\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:17\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:18\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:19\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:20\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:21\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:22\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:23\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:24\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:25\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:26\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:27\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:28\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:29\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:30\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:31\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:32\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:33\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:34\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:35\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:36\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:37\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:38\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:39\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:40\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:41\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:42\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:43\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:44\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:45\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:46\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:47\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:48\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:49\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:50\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:51\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:52\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:53\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:54\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:55\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:56\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:57\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:58\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:58\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 6:59\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:0\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:1\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:2\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:3\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:4\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:5\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:6\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:7\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:8\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:9\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:10\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:11\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:12\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:13\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:14\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:15\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:16\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:17\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:18\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:19\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:20\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:21\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:22\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:23\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:24\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:25\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:26\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:27\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:28\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:29\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:30\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:31\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:32\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:33\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:34\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:35\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:36\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:37\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:38\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:39\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:40\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:41\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:42\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:43\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:44\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:45\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:46\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:47\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:48\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:49\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:50\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:51\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:52\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:53\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:54\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:55\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:56\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:57\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:58\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 1,\u20192021-6-10 7:59\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:1\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:2\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:3\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:4\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:5\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:6\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:7\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:8\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:9\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:10\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:11\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:12\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:13\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:14\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:15\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:16\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:17\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:18\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:19\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:20\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:21\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:22\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:23\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:24\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:25\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:26\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:27\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:28\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:29\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:30\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:31\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:32\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:33\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:34\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:35\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:36\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:37\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:38\u2032 ,FLOOR(1 + (RAND() * 101)) UNION ALL<\/p>\n

SELECT 2,\u20192021-6-10 8:39\u2032 ,FLOOR(1 + (RAND() * 101)) ;<\/p>\n

\u2014 Step3 \u67e5\u8be2<\/p>\n

\u2014 scenario1 \u67e5\u8be2\u4e0d\u5b8c\u6574\u7684\uff0c\u8fd9\u91cc\u52a0\u53bb\u91cd\u662f\u4e3a\u4e86\u5254\u9664\u91cd\u590d\u8bb0\u5f55\u3002<\/p>\n

SELECT seq_no,CONCAT(DATE(add_time),\u2019#\u2019,HOUR(add_time))date_hour,COUNT(DISTINCT add_time) record_cnt<\/p>\n

FROM monitor A<\/p>\n

GROUP BY seq_no,CONCAT(DATE(add_time),\u2019#\u2019,HOUR(add_time))<\/p>\n

HAVING COUNT(DISTINCT add_time)<60<\/p>\n

\/*<\/p>\n

\u7ed3\u679c<\/p>\n

seq_no date_hour record_cnt<\/p>\n

2\u00a0\u00a0 2021-06-10#8\u00a0 39<\/p>\n

*\/<\/p>\n

\u2014 scenario1\uff0c\u6309\u5929\u67e5\u8be2\u56fa\u5b9a\u5c0f\u65f6\u5468\u671f\u5185\u603b\u548c\u7684\u6700\u5927\u503c\uff0c\u5982\u679c\u6709\u91cd\u590d\u6570\u636e\u9700\u52a0\u903b\u8f91\u53bb\u91cd\uff08\u5f53\u524d\u672a\u8003\u8651\uff09<\/p>\n

SELECT SUBSTR(date_hour,1,INSTR(date_hour,\u2019#\u2019)-1) date_only,MAX(sum_hour) max_daily<\/p>\n

FROM<\/p>\n

\u00a0\u00a0\u00a0 (<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SELECT A.seq_no,B.date_hour,SUM(A.stat) sum_hour<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 FROM monitor A<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 JOIN(<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 SELECT seq_no,CONCAT(DATE(add_time),\u2019#\u2019,HOUR(add_time)) date_hour,COUNT(DISTINCT add_time) record_cnt<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 FROM monitor A<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 GROUP BY seq_no,CONCAT(DATE(add_time),\u2019 \u2018,HOUR(add_time))<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 HAVING COUNT(DISTINCT add_time)=60<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 )B<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ON A.seq_no = B.seq_no<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 AND CONCAT(DATE(add_time),\u2019#\u2019,HOUR(add_time)) = B.date_hour<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 GROUP BY A.seq_no,B.date_hour<\/p>\n

\u00a0\u00a0\u00a0 )C<\/p>\n

GROUP BY SUBSTR(date_hour,1,INSTR(date_hour,\u2019#\u2019)-1)<\/p>\n

\/*<\/p>\n

\u7ed3\u679c<\/p>\n

date_only max_daily<\/p>\n

2021-06-10 3289<\/p>\n

*\/<\/p>\n

\u2014 3 \u9488\u5bf9\u4efb\u610f\u5c0f\u65f6\u7684\uff0c\u5efa\u8bae\u901a\u8fc7\u5b58\u50a8\u8fc7\u7a0b(\u5b9a\u4e49\u8d77\u59cb\u65f6\u95f4\u3001\u65f6\u95f4\u6bd4\u8f83\u8de8\u5ea6)\u7ed3\u5408\u7a97\u53e3\u51fd\u6570\uff08:= \u6a21\u62df\u7a97\u53e3\u51fd\u6570\uff09\u5904\u7406<\/p>\n

\u2014 \u8865\u6ce8 1 \u5f53\u524d\u811a\u672c\u7528\u4e86\u968f\u673a\u6570,\u5173\u4e8e\u5b57\u6bb5state\u7684\u7edf\u8ba1\u7ed3\u679c\u4e0d\u56fa\u5b9a\u3002<\/p>\n

\u2014\u00a0\u00a0\u00a0\u00a0\u00a0 2 \u5f53\u524d\u6f14\u793a\u6570\u636e\u5e93\u662fmysql 5.6.14\u3002<\/p>\n

\u5ef6\u4f38\u9605\u8bfb\uff1a<\/strong><\/p>\n

\u4e8c\u3001\u4ec0\u4e48\u662f\u6570\u636e\u5e93\u548c\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf<\/strong><\/h2>\n

\u6570\u636e\u5e93\u7684\u5e94\u7528\u975e\u5e38\u5e7f\u6cdb\uff0c\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u6211\u4eec\u5e73\u65f6\u5728\u6d4f\u89c8\u5668\u4e0a\u641c\u7d22\u5185\u5bb9\uff0c\u5c31\u8981\u7528\u5230\u6570\u636e\u5e93\u53bb\u68c0\u7d22\u6211\u4eec\u7684\u5173\u952e\u5b57\u3002\u4ee5\u524d\u6211\u4eec\u53ef\u80fd\u4f1a\u7528\u6570\u7ec4\u3001\u96c6\u5408\u3001\u6587\u4ef6\u7b49\u6765\u5b58\u50a8\u6570\u636e\uff0c\u4f46\u662f\u63a5\u4e0b\u6765\u6211\u4eec\u5c31\u4f1a\u9762\u4e34\u4e00\u4e2a\u95ee\u9898\uff0c\u5f53\u5b58\u50a8\u7684\u6570\u636e\u6216\u5185\u5bb9\u8fc7\u591a\u7684\u65f6\u5019\uff0c\u6211\u4eec\u5982\u4f55\u53bb\u7cbe\u51c6\u7684\u627e\u5230\u6211\u4eec\u9700\u8981\u7684\u4e1c\u897f\uff0c\u8fd9\u65f6\u5019\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u5c31\u6d3e\u4e0a\u4e86\u7528\u573a\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u8fd8\u80fd\u6c38\u4e45\u7684\u50a8\u5b58\u6211\u4eec\u7684\u6570\u636e\u3002<\/p>\n

\u4e3a\u4e86\u4fbf\u4e8e\u5927\u5bb6\u7406\u89e3\uff0c\u8fd9\u91cc\u5148\u7ed9\u5927\u5bb6\u8bb2\u89e3\u51e0\u4e2a\u6982\u5ff5<\/p>\n

DB\u6570\u636e\u5e93\uff08database)\uff1a\u5b58\u50a8\u6570\u636e\u7684\u201c\u4ed3\u5e93\u201d\u3002\u5b83\u4fdd\u5b58\u4e86\u4e00\u7cfb\u5217\u6709\u7ec4\u7ec7\u7684\u6570\u636e\u3002<\/p>\n

DBMS\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff08Database Management System)\uff1a\u6570\u636e\u5e93\u662f\u901a\u8fc7DBMS\u521b\u5efa\u548c\u64cd\u4f5c\u7684\u5bb9\u5668\u3002<\/p>\n

SQL\uff0c\u7ed3\u6784\u5316\u67e5\u8be2\u8bed\u8a00\uff08Structured Query Language\uff09\u7528\u4e00\u53e5\u8bdd\u6982\u62ec\uff0cSQL\u662f\u4e00\u79cd\u7279\u6b8a\u76ee\u7684\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u4e00\u79cd\u4e13\u95e8\u7528\u6765\u4e0e\u6570\u636e\u5e93\u901a\u4fe1\u7684\u8bed\u8a00\u3002\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u6570\u636e\u88ab\u7ed3\u6784\u5316\u5e76\u5b58\u50a8\u5728\u4e0d\u540c\u7684\u8868\u4e2d\uff0c\u4ece\u800c\u7b80\u5316\u4e86\u8bbf\u95ee\uff0c\u66f4\u65b0\u548c\u64cd\u4f5c\u6570\u636e\u7684\u8fc7\u7a0b\u3002\u8be5\u8868\u7531\u5217\u548c\u884c\u7ec4\u6210\u3002\u6570\u636e\u5e93\u4e2d\u7684\u8868\u53ef\u4ee5\u5728\u5173\u7cfb\u7684\u5e2e\u52a9\u4e0b\u8fdb\u884c\u8fde\u63a5\u3002\u8981\u5728\u6570\u636e\u5e93\u4e2d\u6267\u884c\u4e0e\u6570\u636e\u76f8\u5173\u7684\u4efb\u52a1\uff0c\u53ef\u4ee5\u4f7f\u7528SQL\u3002SQL\u4ee3\u8868\u7ed3\u6784\u5316\u67e5\u8be2\u8bed\u8a00\uff0c\u65e8\u5728\u5728\u7279\u5b9aRDBMS\u5185\u521b\u5efa\uff0c\u4fee\u6539\u548c\u7ba1\u7406\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u3002<\/p>\n

SQL\u4f18\u70b9\uff1a<\/p>\n

1\u3001\u4e0d\u662f\u67d0\u4e2a\u7279\u5b9a\u6570\u636e\u5e93\u4f9b\u5e94\u5546\u4e13\u6709\u7684\u8bed\u8a00\uff0c\u51e0\u4e4e\u6240\u6709DBMS\uff08\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff09\u90fd\u652f\u6301SQL<\/p>\n

2\u3001\u7b80\u5355\u6613\u5b66<\/p>\n

3\u3001\u867d\u7136\u7b80\u5355\uff0c\u4f46\u5b9e\u9645\u4e0a\u662f\u4e00\u79cd\u5f3a\u6709\u529b\u7684\u8bed\u8a00\uff0c\u7075\u6d3b\u4f7f\u7528\u5176\u8bed\u8a00\u5143\u7d20\uff0c\u53ef\u4ee5\u8fdb\u884c\u975e\u5e38\u590d\u6742\u548c\u9ad8\u7ea7\u7684\u6570\u636e\u5e93\u64cd\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u6309\u4eea\u5668\u4e0e\u65f6\u95f4\uff08\u5904\u7406\u6210\u5c0f\u65f6\uff09group by\uff0c\u8ba1\u7b97\u503c\u7684\u6570\u91cf\u4e0e\u548c\uff0c\u518d\u6839\u636e\u7ed3\u679c\u5224\u65ad\u503c\u6570\u91cf\u662f\u5426\u6709\u7f3a\u5931\u503c\uff0c\u4ee5\u53ca\u548c\u7684\u6700\u5927\u503c […]","protected":false},"author":1,"featured_media":34250,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/34249"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=34249"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/34249\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/34250"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=34249"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=34249"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=34249"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}