MS Access SQL在字段值中替换NULL

Question

如果字段中的值为null,则表示值为"NONE";如果字段不是使用select语句的表中的空值,则显示值.声明可能与此类似:

select iif(isnull(spouse),"NONE",spouse) as spouse from biodata

Answer 1

SELECT Nz(spouse,"NONE") AS Nzspouse FROM biodata

Nz()替换spouse用"NONE",如果spouse是NULL,否则返回spouse.