T-SQL語法問題否則，如果風格邏輯

Question

今天有兩個問題，我是一個忙碌的蜜蜂，幸運的是我有一個很棒的社區！

我在這裏的問題是這樣的：

我有一個領域，我需要基於現有的現場數據進行更新。

If Gender = F then foo = 1 

If Gender = M then foo = 2 

If Gender = Male then foo = 2 

If Gender = Female then foo = 1 

If Gender is not above then foo = 3 

以下是我有：

update EmailAddresses 
set Priority1 = '1' 
where GENDER__C = 'Female' 

update EmailAddresses 
set Priority1 = '2' 
where GENDER__C = 'Male' 

update EmailAddresses 
set Priority1 = '1' 
where GENDER__C = 'F' 

update EmailAddresses 
set Priority1 = '2' 
where GENDER__C = 'M' 

update EmailAddresses 
set Priority1 = '3' 
where GENDER__C not in (select 'Female', 'Male', 'F', 'M') 

任何幫助，非常感謝！它的星期五！喔呼

Answer 1

update EmailAddresses set 
    Priority1 = case GENDER__C 
     when 'Female' then 1 
     when 'F' then 1   
     when 'Male' then 2 
     when 'M' then 2 
     else 3 end 

Answer 2

將其更改爲一個CASE語句：

UPDATE EmailAddresses 
SET Priority1 = Case 
    When GENDER_C IN ('Female', 'F') Then '1' 
    When GENDER_C IN ('Male', 'M') Then '2' 
    Else '3' 
End 
FROM EmailAddresses