MySQL對多個條件分別計數

原文鏈接：https://blog.csdn.net/sr_www/article/details/81046432

本文轉自MYSQL|count()函數使用條件分別統計
在一條語句中統計出符合不同條件的行：

select class1_id
    ,class1_name
    ,class2_id
    ,class2_name
    ,run_id
    ,count(run_id) as count_all#提交數
    ,count(run_ok>0 or null) as count_done#處理數
    ,count(run_ok=1 or null) as count1#合格數
    ,count(run_ok=2 or null) as count2#不合格數
from `class2`
join `class1` on class2_class1_id=class1_id
left join `run` on run_class2_id=class2_id and date(run_addtime) between '$s_date1' and '$s_date2'
group by class2_id
order by class1_id,class2_id

輸出結果：