ORA-00979：sum（col）时不是GROUP BY表达式

Question

SELECT 
    INVOICEM.EMP_NO,
    EMPLOYEES.EMP_NAME,
    INVOICEM.INV_NO,
    SUM(INVOICEM.SUM_AMT),
    INVOICEM.SAL_DATE,
    INVOICEM.BRANCH
FROM INVOICEM JOIN EMPLOYEES
ON INVOICEM.EMP_NO = EMPLOYEES.EMP_NO
GROUP BY INVOICEM.EMP_NO,EMP_NAME

帮帮我

Answer 1

您只能在oracle中选择分组语句或聚合函数的字段：

SELECT INVOICEM.EMP_NO,EMPLOYEES.EMP_NAME,SUM(INVOICEM.SUM_AMT)
FROM INVOICEM JOIN EMPLOYEES
ON INVOICEM.EMP_NO = EMPLOYEES.EMP_NO
GROUP BY INVOICEM.EMP_NO,EMP_NAME