Question

I have a mysql table having register number, dob, student name, sex, total mark in a semester in each row.
I would like to get records of 10 Boys and 5 girls in descending order of total marks in a single SQL query.

Answer 1

My MySQL dialect is rusty but this should do the trick

(SELECT * FROM Students WHERE sex = 'Male' ORDER BY TotalMarks DESC LIMIT 10)
UNION ALL
(SELECT * FROM Students WHERE sex = 'Female' ORDER BY TotalMarks DESC LIMIT 5)

It’s a single query, mind you.