Not a group by column error message - cursor sharing

Question

Hi,
Our database is Oracle 11g.
We faced problems about some sql's. These sql's were running in Oracle 10g.
Our sql statements are like the below query:
SELECT COLUMN_A,COLUMN_B,COLUMN_C,
TO_CHAR(OPERATION_DATE,'DD/MM/YYYYY'), CUSTOMER_NAME || '-' || CUSTOMER_SURNAME,
DECODE (IS_MANAGER, 0, ' Manager', 'Employee')
SUM(TOTAL), SUM(AMOUNT), AVG(SALARY),
FROM TABLES
GROUP BY COLUMN_A,COLUMN_B,COLUMN_C,
TO_CHAR(OPERATION_DATE,'DD/MM/YYYYY'), CUSTOMER_NAME || '-' || CUSTOMER_SURNAME,
DECODE (IS_MANAGER, 0, ' Manager', 'Employee')
ORDER BY COLUMN_A,COLUMN_B,COLUMN_C,
TO_CHAR(OPERATION_DATE,'DD/MM/YYYYY'), CUSTOMER_NAME || '-' || CUSTOMER_SURNAME,
DECODE (IS_MANAGER, 0, ' Manager', 'Employee')
When we remove order by or when we disabled cursor sharing, problem is fixed.
I think that sql looks correct. Why we are taking not a group by column error message?
How can we fix this problem without changing querys( we have other reports which gives same error message) or disabling cursor sharing?
Thank you, Bye

Answer 1

Dear,
SELECT   column_a
        ,column_b
        ,column_c
        ,TO_CHAR (operation_date, 'DD/MM/YYYYY')
        ,customer_name || '-' || customer_surname
        ,DECODE (is_manager, 0, ' Manager', 'Employee')
        ,SUM (total)
        ,SUM (amount)
        ,AVG (salary)
    FROM TABLES
GROUP BY column_a,
         column_b,
         column_c,
         TO_CHAR (operation_date, 'DD/MM/YYYYY'),
         customer_name || '-' || customer_surname,
         DECODE (is_manager, 0, ' Manager', 'Employee')
ORDER BY column_a,
         column_b,
         column_c,
         TO_CHAR (operation_date, 'DD/MM/YYYYY'),
         customer_name || '-' || customer_surname,
         DECODE (is_manager, 0, ' Manager', 'Employee')Here you are grouping by
DECODE (is_manager, 0, ' Manager', 'Employee')What does represent the is_manager? it is a function ? it might be that you hit one of the group by restriction such as select are not allowed into the group by clause
Best regards
Mohamed Houri