Nested query, analogue of the NOT FORALL quantifier?

V

Veymo2020-04-15 21:58:41

MySQL

Veymo, 2020-04-15 21:58:41

Help me please!
I just can't understand the essence of the task from the university :c
How to write a nested query so that it implements the operation in the same way as if the NOT FORALL quantifier was used? JetSQL

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