Q12919 – Tecnologia da Informação – Fundação Getulio Vargas 2022

select * FROM X WHERE not exists (select * FROM Y where X.A=Y.A)

select * FROM X WHERE not exists (select * FROM Y where X.A<>Y.A)

select * FROM X WHERE X.B IS NULL

select * FROM Y WHERE not exists (select * FROM X where X.A=Y.A)

select * FROM Y WHERE not exists (select * FROM X where X.A<>Y.A)