设有订单表order(订单号,客户号,职员号,签订日期,金额),查询2011年所签订单的信息,并按金额降序排序,正确的SQL命令是( )。
- A.SELECT * FROM order WHERE YEAR(签订日期)=2011 ORDER BY 金额 DESC
- B.SELECT * FROM order WHILE YEAR(签订日期)=2011 ORDER BY 金额 ASC
- C.SELECT * FROM order WHERE YEAR(签订日期)=2011 ORDER BY 金额 ASC
- D.SELECT * FROM order WHILE YEAR(签订日期)=2011 ORDER BY 金额 DESC
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