I 开发者_StackOverflow中文版have a MySQL query: SELECT DISTINCT c.id, c.company_name, cd.firstname,
I am trying to optimize a sql query which is using order by clause. When I use EXPLAIN the query always d开发者_JS百科isplays \"using filesort\". I am applying this query for a group discussion forum
I\'m trying to optimize this query: SELECT `posts`.* FROM `posts` INNER JOIN `posts_tags` ON `posts`.id = `posts_tags`.post_id
I need your help to optimize the query to avoid using \"Using filesort\".The job of the query is to select all the articles that belongs to specific tag. The query is:
这两天，一个调解夫妻关系的视频刷爆了朋友圈，视频中，夫妻二人正在吵架。
加载中,请稍侯......