更新同一列中的多個值

Question

我有一個名爲Movie_Stars的數據表。我想更新多個值，但它們都在同一列中。以下是我的：

update movie_stars 
set movie_category = 'Family' 
where movie_category = 'Drama' 
and set movie_category = 'Children' 
where movie_category = 'Cartoon' 
and set movie_category = 'Teen' 
where movie_category = 'Action'; 

但是，這會產生錯誤「無效的user.table.column，table.column或列規範」。那麼什麼是正確的色譜柱規格？

Answer 1

使用CASE表達：

update movie_stars 
set movie_category = case when movie_category = 'Drama' 
          then 'Family' 
          when movie_category = 'Cartoon' 
          then 'Children' 
          when movie_category = 'Action' 
          then 'Teen' 
        end 
where movie_category in ('Drama', 'Cartoon', 'Action')