2014年5月27日
区段统计 mysql 语句 case when then end as
摘要： EXPLAIN SELECT COUNT(*),CASEWHEN device_width > 729 THEN '>729'WHEN device_width BETWEEN '720' AND '729' THEN '720-729'WHEN device_width BETWEEN '710'... 阅读全文
posted @ 2014-05-27 18:39 adby 阅读(237) 评论(0) 推荐(0) 编辑