Question

我是新手，有一个简单的问题。在Microsoft Access中，我有几个正面或负面答案的字段。我可以将这些字段汇总到一个字段中，该字段包含查询中具有肯定答案的字段吗？

实施例

Field1 : positive
Field2 : negative
Field3 : negative
Field4 : positive

Newfield : Field1, Field4

Answer 1

这是以下查询的输出，id和Field1到Field4存储在名为 YourTable 的表格中。

id Field1   Field2   Field3   Field4   NewField
-- -------- -------- -------- -------- --------------
 1 positive negative negative positive Field1, Field4
 2 negative positive positive negative Field2, Field3
 3 negative negative negative positive Field4
 4 positive negative negative negative Field1

SELECT
    sub.id,
    sub.Field1,
    sub.Field2,
    sub.Field3,
    sub.Field4,
    IIf
        (
            Right(sub.raw_string,2)=', ',
            Left(sub.raw_string, Len(sub.raw_string) -2),
            sub.raw_string
        ) AS NewField
FROM
    (
        SELECT
            y.id,
            y.Field1,
            y.Field2,
            y.Field3,
            y.Field4,
              (IIf(y.Field1='positive','Field1',Null) + ', ')
            & (IIf(y.Field2='positive','Field2',Null) + ', ')
            & (IIf(y.Field3='positive','Field3',Null) + ', ')
            &  IIf(y.Field4='positive','Field4',Null)
                AS raw_string
        FROM YourTable AS y
    ) AS sub;

如何将字段汇总到一个字段中？

1 个答案: