我正在尝试收集一些关于我的数据库中性能最差的查询的统计信息。 我打开了 MySQL 的慢查询日志记录,并一直在监视数据库中的 slow_log 表。
我正在尝试获取每天的唯一查询计数,如下所示:
Date count query
2016-11-20 15 'SELECT * FROM XYAA'
2016-11-20 196 'SELECT count(*) FROM BLAH'
2016-11-19 7 'SELECT * FROM XYAA'
2016-11-19 296 'SELECT count(*) FROM BLAH'
slow_log表结构:
CREATE TABLE `slow_log` (
`start_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`user_host` mediumtext NOT NULL,
`query_time` time NOT NULL,
`lock_time` time NOT NULL,
`rows_sent` int(11) NOT NULL,
`rows_examined` int(11) NOT NULL,
`db` varchar(512) NOT NULL,
`last_insert_id` int(11) NOT NULL,
`insert_id` int(11) NOT NULL,
`server_id` int(10) unsigned NOT NULL,
`sql_text` mediumtext NOT NULL,
`thread_id` bigint(21) unsigned NOT NULL
) ENGINE=CSV DEFAULT CHARSET=utf8 COMMENT='Slow log' |
最佳答案
试试这个:
SELECT DATE(start_time) as `date`,
COUNT(*) as `count`,
sql_text as query
FROM `slow_log`
GROUP BY DATE(start_time) , sql_text
关于MySql slow_log查询分组,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40765070/