MS Access SQL在字段值中替換NULL

Question

如果字段中的值為null，則表示值為“NONE”;如果字段不是使用select語句的表中的空值，則顯示值。 聲明可能與此類似：

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

Answer 1

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

如果spouse為NULL ，則Nz()用"NONE"替換spouse ，否則返回spouse 。