单选题执行如下两个查询，结果为（） Select ename name，sal salary from emp order by salary Select ename name，sal“salary”from emp order by sal ascA两个查询结果完全相同B第一个查询正确，第二个查询错误C两个查询结构不同D第二个查询正确，第一个查询错误
单选题
执行如下两个查询，结果为（） Select ename name，sal salary from emp order by salary Select ename name，sal“salary”from emp order by sal asc
A
两个查询结果完全相同
B
第一个查询正确，第二个查询错误
C
两个查询结构不同
D
第二个查询正确，第一个查询错误
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