Sql query to find Id tagged to multiple rows

Question

I have a student table with the below structure.

StudentId    StudentName     SubjectId
     123         Lina              1
     456         Andrews           4
     123         Lina              3 
     123         Lina              4
     456         Andrews           5

Need to write a query to get the studentId where the subjectid is equal to 1,3 and studentid is not equal to 4

Select studentId from student  where subject Id='1' and SubjectId ='3' and     
subjectId ='4' .

Output studentId should be 123

But it does not work out. Any help is appreciated

Answer 1

The easiest way would be

select StudentId from student
where SubjectId in (1,3,4)
group by StudentId
having count(distinct SubjectId) = 3

Answer 2

Try with grouping:

Select studentId 
from student  
where subject_Id in ('1', '3', '4')
group by studentId 
having count(distinct subject_Id) = 3

Note: You might consider changing ('1', '3', '4') to (1, 3, 4) if subject_Id field is of type int .

Note2: distinct keyword inside count should be used in case you have duplicate subject_Id values per studentId .

Answer 3

At once you can use only 1 subject id, for that your query must use or instead of and And don't use single course as well

Select studentId from student where subject Id=1 or SubjectId =3 or
subjectId =4 .

Try this once