使用 EXPLAIN 函数可以清楚的查看语句的执行情况 EXPLAIN select id from b_nc_card where id != 10000; 一共查询了:530912 行 优化后 EXPLAIN (select id from b_nc_card where id > 10000) Read More
posted @ 2020-06-19 18:55 AlexZS Views(368) Comments(0) Diggs(0)