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多选题
Which three statements are true regarding subqueries?()
A
Subqueries can contain GROUP BY and ORDER BY clauses
B
Main query and subquery can get data from different tables
C
Main query and subquery must get data from the same tables
D
Subqueries can contain ORDER BY but not the GROUP BY clause
E
Only one column or expression can be compared between the main query and subquery
F
Multiple columns or expressions can be compared between the main query and subquery
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