在为Postgres SQL选择情况下，如何使用like运算符？

Question

我想编写一个带有CASE WHEN子句的SQL语句，该子句使用LIKE运算符，但是我不确定如何正确设置该语句的格式。

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

Answer 1

以这种方式尝试：

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