sql case when then else

原創 爱吃芒果de仙女 2020-07-05 23:59

今天寫sql的時候，用了這個條件

我就把這個講解下吧，初學者可能一開始看不懂

case when s_score is null then 0 else s_score end

意思就是

當s_score值爲空的時候就等於0

否則取它本身的值

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