如何在使用Postgres SQL的情況下使用類似運算符？

Question

我想寫一個CASE WHEN子句使用LIKE運算符的SQL語句，但我不知道如何正確格式化語句。

SELECT 
    services.id, 
    (CASE services.description 
    WHEN LIKE '%-' 
     THEN services.amount * -1 
    ELSE services.amount 
    END) AS service_amount 
FROM services 

Answer 1

試試它是這樣的：

SELECT 
    services.id, 
    CASE WHEN services.description LIKE '%-' 
     THEN services.amount * -1 
     ELSE services.amount 
    END) AS service_amount 
FROM services