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Hi every body
 
I have a table of courses and another for students.
And I need to fill a grid view with the following information
 
1- course ID
2- course name
3- number of students in each course
 
Without repeating the course name, means each course in a single row.
 
Note: I am using a query builder.
 
than you
Posted 18-Jan-13 12:22pm
Comments
PIEBALDconsult at 18-Jan-13 18:42pm
   
More information is required. There ought to be a table to provide a many-to-many relationship between the students and courses.
Nasser Abu Farah at 18-Jan-13 18:47pm
   
OK
I have the three tables, what I am really concerned about is how to calculate the number of students in the StudentCourses table for each course using the query builder or a C# code.
thank you
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Solution 1

to do that use the Group BY Clause of sql
 
refer this link
http://www.tizag.com/sqlTutorial/sqlgroupby.php[^]
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Solution 2

select
course_id,
count(students_id)
from studentcoursestable
 
group by course_id
 
---format syntax and object names
---and next time do a little google search
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