Question

我正在Oracle 10g中执行此语句。

     select CASE Math WHEN BETWEEN 90 AND 100 THEN 'A'
                      WHEN BETWEEN 80 AND 90  THEN 'B'
                      WHEN BETWEEN 0  AND 80  THEN 'C'
                      ELSE 'Invalid score' END
       from score

但是我收到以下错误

ORA-00936：缺少表达

有人可以帮助解决我错过的问题吗？

Answer 1

在SQL语句中，CASE语句需要类似于

SELECT CASE WHEN math BETWEEN 90 AND 100 
            THEN 'A'
            WHEN math BETWEEN 80 AND 90
            THEN 'B'
            WHEN math BETWEEN 0 AND 80
            THEN 'C'
            ELSE 'Invalid Score'
         END
  FROM score

CASE variable WHEN语法在PL / SQL中有效，但在SQL中无效。

Answer 2

而不是使用条件我会这样做：

 select CASE WHEN math BETWEEN 90 AND 100 THEN 'A'
                      WHEN math BETWEEN 80 AND 90  THEN 'B'
                      WHEN math BETWEEN 0  AND 80  THEN 'C'
                      ELSE 'Invalid score' END
       from score

如果没有前面的变量，我认为Oracle不喜欢BETWEEN函数。

Oracle 10g：select语句中的CASE（ORA-00936错误）

2 个答案: