更新时间:2023-11-22 15:21:46
select id, count(id) from table group by id
如果只想计数id,那么
If only want count of ids, then
select count(id) from table group by id
这是有关分组依据子句的简单教程
Here is a simple tutorial of group by clause
http://www.w3schools.com/sql/sql_groupby.asp
为每个不同的行选择计数(mysql和php)