如何将 GROUPING 值从 0/1 更改为 no/yes？

Question

如何将Department ID Used 和Job ID used 列的值从0/1 更改为no/yes？

这是我的查询：

SELECT d.department_name "department name", e.job_id "job title",
       SUM(e.salary) "monthly cost",
       GROUPING(d.department_id) "Department ID Used" ,
       GROUPING(e.job_id) "Job ID Used"
  FROM employees e
  JOIN departments d
    ON e.department_id=d.department_id
 GROUP BY CUBE(d.department_name, d.department_id, e.job_id)
ORDER BY d.department_name, e.job_id

Answer 1

只需替换

DECODE(GROUPING(department_id),0,'no','yes') 与 GROUPING(d.department_id)

和

DECODE(GROUPING(e.job_id),0,'no','yes') 与 GROUPING(e.job_id)

Answer 2

您可以在 GROUPING BY 中添加 CASE WHEN 子句：

CASE WHEN GROUPING(d.department_id) = 0 THEN 'NO' ELSE 'YES' END

CASE 可用于 SQL 和 PLSQL
而DECODE 是特定于 Oracle 的，只能在 SQL 中使用。