如何将字段汇总到一个字段？

Question

我是新手，有一个简单的问题。 在Microsoft Access中，我有几个带有肯定或否定答案的字段。 我可以将这些字段汇总到一个字段中，该字段包含哪些字段在查询中具有肯定答案？

例

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

Newfield : Field1, Field4 

Answer 1

这是从下面的查询与id和Field1输出通过Field4存储于命名为YourTable表。

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;