mysql - sql列格式化

Question

只是一个简单的问题要问

在 MySQL 中，我如何将数值显示为字符串等值？

所以

1 = New
2 = Old
3 = Cancelled

所以如果我有类似的东西

SELECT object_name, object_status where object_status > 0

然后返回

object#1, 1
object#2, 2
object#3, 1
object#4, 3

但我想让它显示

object#1, New
object#2, Old
object#3, New
object#4, Cancelled

提前致谢KS

Answer 1

你可以在这上面使用CASE，

SELECT object_name,         
        CASE object_status 
            WHEN 1 THEN 'New'
            WHEN 2 THEN 'Old'
            WHEN 3 THEN 'Cancelled'
            ELSE NULL
        END status
where object_status > 0

或

SELECT object_name,         
        CASE 
            WHEN object_status = 1 THEN 'New'
            WHEN object_status = 2 THEN 'Old'
            WHEN object_status = 3 THEN 'Cancelled'
            ELSE NULL
        END status
where object_status > 0