Question

我尝试从结果中获取列，但是所有时间都有错误＆＃34; Incorect语法附近＆＃39;）＆＃39;＆＃34;＆＃39;＆＃39;即使我把Select *放在第一个选择中。我在SQL Management Studio上工作。我的代码看起来像

select ColumnResult from (
            select col1 as ColumnResult, col2 as Column2Result, col3 as Column3Result
            from SourceTable 
            except
            select col1 as ColumnResult, col2 as Column2Result, col3 as Column3Result
            from SourceTable2)

Answer 1

您需要为子查询提供别名：

select ColumnResult from (
            select col1 as ColumnResult, col2 as Column2Result, col3 as Column3Result
            from SourceTable 
            except
            select col1 as ColumnResult, col2 as Column2Result, col3 as Column3Result
            from SourceTable2) AS Src

Answer 2

您收到错误，因为每个表都有自己的别名，所以这样做

select A.ColumnResult from (
                select col1 as ColumnResult, col2 as Column2Result, col3 as Column3Result
                from SourceTable 
                except
                select col1 as ColumnResult, col2 as Column2Result, col3 as Column3Result
                from SourceTable2) as A

sql选择除结果之外的列

2 个答案: