单选题对由SELECT--FROM—WHERE—GROUP--ORDER组成的SQL语句，其在被DBMS处理时，各子句的执行次序为（）ASELECT—FROM—GROUP—WHERE—ORDERBFROM--WHERE——GROUP——ORDER——SELECTCFROM——WHERE——GROUP——SELECT——ORDERDSELECT——FROM——WHERE——GROUP——ORDER
单选题
对由SELECT--FROM—WHERE—GROUP--ORDER组成的SQL语句，其在被DBMS处理时，各子句的执行次序为（）
A
SELECT—FROM—GROUP—WHERE—ORDER
B
FROM--WHERE——GROUP——ORDER——SELECT
C
FROM——WHERE——GROUP——SELECT——ORDER
D
SELECT——FROM——WHERE——GROUP——ORDER
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