Request to summarize previous values
I have a table structure as shown 
.
I need to get the values added to the sum of the previous values (shown in REQUIRED RESULT) I tried the following query
SELECT empid,
sum(tot_hours) OVER (PARTITION BY empid ORDER BY empid ) AS tot_hours
FROM empDet
ORDER BY empid
But I am getting the following result set
But I want a result like in the first picture.
Can anyone help me to do this?
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sum (tot_hours) OVER (PARTITION by empid ORDER BY empid) AS tot_hours
Unfaithful . If you want to run SUM on then you must order tot_hours. ORDER BY
TOT_HOURS
For example, the following query will calculate the current salary of employees in each department:
SQL> SELECT deptno,
2 sal,
3 SUM(sal) OVER (PARTITION BY deptno ORDER BY sal ) AS tot_sal
4 FROM emp
5 ORDER BY deptno;
DEPTNO SAL TOT_SAL
---------- ---------- ----------
10 1300 1300
10 2450 3750
10 5000 8750
20 800 800
20 1100 1900
20 2975 4875
20 3000 10875
20 3000 10875
30 950 950
30 1250 3450
30 1250 3450
30 1500 4950
30 1600 6550
30 2850 9400
14 rows selected.
SQL>
Refresh . For duplicate values, the total will be duplicated. To make it unique, use the UNLIMITED TERMINATION offer . For example,
SQL> SELECT empno, deptno,
2 sal,
3 SUM(sal) OVER (PARTITION BY deptno ORDER BY sal ROWS UNBOUNDED PRECEDING) AS tot_sal
4 FROM emp
5 ORDER BY deptno;
EMPNO DEPTNO SAL TOT_SAL
---------- ---------- ---------- ----------
7934 10 1300 1300
10 1300 2600
7782 10 2450 5050
7839 10 5000 10050
7369 20 800 800
7876 20 1100 1900
7566 20 2975 4875
7788 20 3000 7875
7902 20 3000 10875
7900 30 950 950
7521 30 1250 2200
7654 30 1250 3450
7844 30 1500 4950
7499 30 1600 6550
7698 30 2850 9400
15 rows selected.
SQL>
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