note

declare @today datetime 
set @today = (select convert(char(10),getdate(),120))

select 
    CASE 
    WHEN datepart(weekday,@today) = 1 THEN '星期日'
    WHEN datepart(weekday,@today) = 2 THEN '星期一'
    WHEN datepart(weekday,@today) = 3 THEN '星期二'
    WHEN datepart(weekday,@today) = 4 THEN '星期三'
    WHEN datepart(weekday,@today) = 5 THEN '星期四'
    WHEN datepart(weekday,@today) = 6 THEN '星期五'
    WHEN datepart(weekday,@today) = 7 THEN '星期六'
    END AS '_day'

 

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key 宣告

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select 
    case 
        when (max(click_id) is null) then 0 
        else (max(click_id))+1
    end as '_id' 
from 
    { TABLE }