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【多项选择题】

Which two statements are true about WHERE and HAVING clauses? （）

A、A. A WHERE clause can be used to restrict both rows and groups.

B、B. A WHERE clause can be used to restrict rows only.

C、C. A HAVING clause can be used to restrict both rows and groups.

D、D. A HAVING clause can be used to restrict groups only.

E、E. A WHERE clause CANNOT be used in a query of the query uses a HAVING clause.

F、F. A HAVING clause CANNOT be used in subqueries.

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