mysql-MySQL错误Everyderivedtablemusthaveitsownalias

来源：一二三四网

mysql

SELECT *
from (select *
from student
where dept_name = 'Comp.Sci.')
natural full outer join
(select *
from takes
where semester = 'Spring' and year = 2009 ) as aa ;

 到底怎么改 T-T

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