我正在使用这段代码:
SELECT MACH_NO,
COUNT(MACH_NO) AS TOTAL_REPORTS
FROM MAINTENANCE_LOG
GROUP BY MACH_NO;
...检索一些数据,这些数据给出:
MACH_NO TOTAL_REPORTS
----------------------
1 4
5 2
8 1
7 1
如何仅在总报告大于三个的情况下检索?我试过:
WHERE TOTAL_REPORTS > 3
...但它说
ORA-00904: "TOTAL_REPORTS": 标识符无效