强制短文本字段始终为X字符

Question

我试图在查询中使用IIF()语句将短文本字段更新为始终为4个字符。这是我的语法，但是

SELECT DISTINCT IIf(Len([User ID] = 1), "000" & [User ID], IIf(Len([User ID] = 2), "00" & [User ID], IIf(Len([User ID] = 3), "0" & [User ID], [User ID]))) AS ST
FROM _TestData;

然而，无论长度如何，它似乎都会向数据追加0？

Answer 1

可能很简单：

SELECT DISTINCT Right("000" & [User ID], 4) AS ST
FROM TestData;

Answer 2

如果[User ID]是数字，请尝试以下操作：

SELECT DISTINCT Format([User ID], "0000") AS ST
FROM _TestData;

<强>更新

错过了该字段是短文本。在这种情况下

SELECT DISTINCT Format(CLng(Nz([User ID],0)), "0000") AS ST
FROM _TestData;