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Standard SQL Functions

Introduction
Simple CASE WHEN
Searched CASE WHEN
CASE WHEN with aggregates
CASE WHEN with GROUP BY
Summary
26. Exercise 2

Instruction

Okay. Another exercise.

Exercise

Show the number of students who scored at least 60 in both math and language (as versatile_candidates) and the number of students who scored below 40 in both of these tests (as poor_candidates). Don't include students with NULL preferred_contact.