Question

I’ve 2 tables:
nameTable

• userName
• userId
• classId

marksTable

• userId
• classId
• courseCode
• marks

i want to display userId, userName, courseCode, marks of all the students having same classId.

create proc mark__classId
@classId int
as
select marksTable.courseCode, marksTable.userId, marksTable.marks, nameTable.userName
from marksTable, nameTable
where
marksTable.classId = nameTable.classId 

but this query gave very vague o/p.

Suppose “name1” with id NAME1 with classId 10 follows courseCode ‘C1, C2, C3’ with respective marks ‘80,99,90’
now I want to display all this information when I give input as

exec mark__classId 10

Answer 1

Your select should be more like this, you just need to use your incoming parameters. As well as you should be using a JOIN instead of a CROSS JOIN with a filter

SELECT marksTable.courseCode, marksTable.userId, marksTable.marks, nameTable.userName
FROM marksTable
JOIN nameTable
    ON marksTable.classId = nameTable.classId 
WHERE marksTable.classId = @classId