（mysql）一條sql統計一張表多個狀態的數量

第一種、通過count和if判斷來統計

select
COUNT(*) AS total,
COUNT(if( mdt_apply_type='1' ,1,NULL) )as singleDiseasesNum,
COUNT(if( mdt_apply_type='2' ,1,NULL) )as multidisciplinaryNum
from t_mdt_apply_list b WHERE 1=1 AND audit_opinion='3'

查詢效果如下:

第二種、通過sum和if判斷來統計

select
COUNT(*) AS total,
SUM(if( mdt_apply_type='1' ,1,0) )as singleDiseasesNum,
SUM(if( mdt_apply_type='2' ,1,0) )as multidisciplinaryNum
from t_mdt_apply_list b WHERE 1=1 AND audit_opinion='3'

查詢效果如下: