SQL Access group by 使用注意事项
在MS SQL 中正常的语句：
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select Field1,sum(Field2) as Field2n from Tables where group by Field1 order by Field2 desc |
在Access中会报错：
主要原因是受后缀：order by 的影响，它会把order by 的参数当做合计函数的一部分，应该改成：
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select * from ( select Field1,sum(Field2) as Field2n from Tables where group by Field1) order by Field2 desc |