Question

ID    | Subject | Grade

12113   BM         A     
12113   BI         A    
12113   MM         A    
12113   SJ         A    
12113   GE         B    
12113   SV         A    
12113   PJ         A    
12112   BM         A     
12112   BI         A    
12112   MM         A    
12112   SJ         A    
12112   GE         A    
12112   SV         A    
12112   PJ         A 

Hie all, above are the sample table of showing the studentID with multiple subject takens. I couldnt figure out how to use mysql query to check if the same studentID has score A for all subjects.

was trying to use HAVING MAX(Grade) = 'A' but doesnt help. any advice?

Answer 1

select ID, 
case when count(ID) = sum(case when Grade = 'A' then 1 else 0 end) then 'YES' else 'NO' end as IsAllAGrade
from yourTable
group by ID