在Access中标记重复

Question

我想在Access 2013中编写一个查询来标记第一次单词显示为“是”且所有后续时间显示为“否”。我在下面包含了一个示例。 “不同”列是我希望我的查询生成的。

谢谢

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Word  Distinct 
First  Yes 
Second Yes 
First  No 
Third  Yes 

Answer 1

这里有一个办法：

SELECT *, IIf(DMin("ID","Table1","[Word]='" & [Word] & "'")=[ID],"Yes","No") AS FirstWord 
FROM Table1; 

另：

SELECT *, IIf([ID] = (SELECT TOP 1 ID FROM Table1 AS Dupe WHERE Dupe.Word = Table1.Word ORDER BY Dupe.Word, Dupe.ID), "Yes", "No") AS FirstWord FROM Table1; 

DISTINCT是一个保留字，所以我用它作为避免字段名称。