SQL Server根據不同字段值的條件，選擇不同的字段值

Question

我想從我的表offer中選擇數據，其中有一個字段名爲type，我需要對每種類型應用不同的條件。

代碼可能是這樣的：

select * from offer where 
if type = 1 then apply condition_1, 
else if type = 2 then apply condition_2 and condition_3, 
else if type = 3 then apply condition_4, 

所以，我怎麼能做到這一點？

Answer 1

select * from offer 
where (type =1 and condition_1) 
or (type = 2 and condition_2 and condition_3) 
or (type = 3 and condition_3) 

Answer 2

select * from offer 
where CASE WHEN [type] = 1 then condition_1 
      WHEN [type] = 2 then (condition_2 and condition_3) 
      WHEN [type] = 3 then apply condition_4 END`