sql - Oracle sql中的if语句

Question

我想要一个仅根据条件显示好或坏的列:

select (if (salary>10000) then 'good' else 'bad')as "Grade" from employees;

它给了我

ORA-00907: missing right parenthesis
00907. 00000 -  "missing right parenthesis"
*Cause:    
*Action:
Error at Line: 14 Column: 19

错误出现在“>”处。我该怎么写呢？

Answer 1

您可以(应该？)使用 ANSI-SQL case 表达式:

SELECT CASE WHEN salary > 10000 THEN 'good' ELSE 'bad' END AS "Grade"
FROM   employees;