Nested Queries
Nested Queries

A nested SELECT is a query within a query, i.e. when you have a SELECT statement within the main SELECT.

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Basera queryn på resultatet från en annan query

SELECT *

FROM students

WHERE GPA > (

SELECT AVG(GPA)

FROM students);

SELECT AVG(number_of_students)

FROM classes

WHERE teacher_id IN (

SELECT id

FROM teachers

WHERE subject = 'English' OR subject = 'History');

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Nested QueriesNested Queries