Unexpected result with select max(colmn) in anonymous block

Question

Hi
The following query gives me 28,800 as sum(sal)
SELECT SUM(salary)
FROM employees
    WHERE department_id =60
O/P is :  28800But when i use the above query in anonymous block it gives me 684400
DECLARE
v_sum_sal NUMBER;
department_id employees.department_id%TYPE := 60;
BEGIN
    dbms_output.put_line ('The department_id is'||department_id);
   SELECT SUM(salary)
      into v_sum_sal
    FROM employees
    WHERE department_id = department_id ;
   dbms_output.put_line ('The sum of sal is'||v_sum_sal);
END;The above output statements gives me 684400 as output.. But the expected is 28800
Could you please hint me why the output differs in anonymous block

Answer 1

Smile wrote:
Hi
The following query gives me 28,800 as sum(sal)
SELECT SUM(salary)
FROM employees
WHERE department_id =60
O/P is :  28800But when i use the above query in anonymous block it gives me 684400
DECLARE
v_sum_sal NUMBER;
department_id employees.department_id%TYPE := 60;
BEGIN
dbms_output.put_line ('The department_id is'||department_id);
SELECT SUM(salary)
into v_sum_sal
FROM employees
WHERE department_id = department_id ;
dbms_output.put_line ('The sum of sal is'||v_sum_sal);
END;The above output statements gives me 684400 as output.. But the expected is 28800
Could you please hint me why the output differs in anonymous blockBecause you've made the mistake of having the same name for your column and your variable.
department_id is taken to be the column on both sides of the equality in your query - so it's picking up all rows.