DROP DATABASE IF EXISTS test; CREATE DATABASE test; USE test; CREATE TABLE `test`.`t1` ( `id` int(11) DEFAULT NULL, `site_name` varchar(25) DEFAULT NULL, `last_update` datetime DEFAULT NULL, UNIQUE KEY `idx_id` (`id`), KEY `idx_last_update` (`last_update`), KEY `idx_site_name` (`site_name`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1; INSERT INTO `test`.`t1` VALUES (1385108873,'Carolyn Ryan','2018-01-13 17:05:24'), (2140660022,'Patricia Garza','2018-01-13 19:07:51'), (1473481373,'Rachel George','2017-12-05 21:09:53'), (1394124308,'Mrs. Ms. Miss Janet Dixon','2017-10-28 07:07:41'), (1978918050,'Louis Gray Jr. Sr. I II I','2017-11-01 22:10:39'), (1275940242,'Lois Spencer','2018-02-22 01:01:38'), (NULL,NULL,NULL), (NULL,NULL,NULL); CREATE TABLE `t2` ( `id` int(11) DEFAULT NULL, `site_name` varchar(25) NOT NULL, `last_update` datetime DEFAULT NULL, PRIMARY KEY (`site_name`), UNIQUE KEY `idx_id` (`id`), KEY `idx_last_update` (`last_update`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1; INSERT INTO `test`.`t2` VALUES (1385108873,'Carolyn Ryan','2018-01-13 17:05:24'), (2140660022,'Patricia Garza','2018-01-13 19:07:51'), (1473481373,'Rachel George','2017-12-05 21:09:53'), (1394124308,'Mrs. Ms. Miss Janet Dixon','2017-10-28 07:07:41'), (1978918050,'Louis Gray Jr. Sr. I II I','2017-11-01 22:10:39'), (1275940242,'Lois Spencer','2018-02-22 01:01:38'), (NULL,"aaa",NULL); ANALYZE TABLE `test`.`t1`, `test`.`t2`;