SQL查詢改進（表中的附加列）

Question

我在SQL中有這個查詢，我知道它寫得很糟。 你們能幫我以體面，普通的方式寫出來嗎？

謝謝。

select distinct R.*, X.LIKED
from Recipe R
left join (select distinct R.* , '1' as LIKED 
           from Recipe R, Likes L 
           where R.id = L.idRecipe 
             and L.email = 'dvader@deathstar.galacticempire') X
on R.id = X.id

Answer 1

看起來您需要食譜中所有帶有vader@deathstar.galacticempire喜歡的標記的東西

select R.*, likedR.LIKED
from Recipe R
left join (select distinct R.id , '1' as LIKED 
           from Recipe R 
                inner join Likes L on R.id = L.idRecipe
           where  
                L.email = 'dvader@deathstar.galacticempire') likedR
on R.id = likedR.id

Answer 2

感謝大家的幫助。

我可以通過此查詢執行我想做的事情：

select distinct R.*, X.LIKED, U.imgUrl 
from  User U, Recipe R 
left join 
    (select distinct R.* , '1' as LIKED 
     from Recipe R, Likes L 
     where R.id = L.idRecipe and L.email = 'dvader@deathstar.ge') X 
on R.id = X.id 
where R.email = U.email

如果dvader的條目位於另一個表中，這將把我需要的所有信息加到一個表中，再加上1個額外的列（帶1或null），該表位於使用連接的另一個表中。