How to count impact / number of occurrence of a string
Hello
If I start with this:
WITH approval_tbl AS (SELECT 123456 docno, 'SUBMIT' action_code, '02-MAY-2013 13:09:55' action_date, 0 seq FROM DUAL UNION ALL SELECT 123456, 'RESERVE', '02-MAY-2013 13:09:55', 1 FROM DUAL UNION ALL SELECT 123456, 'APPROVE', '02-MAY-2013 14:59:47', 2 FROM DUAL UNION ALL SELECT 123456, 'APPROVE', '02-MAY-2013 16:25:14', 3 FROM DUAL) SELECT * FROM approval_tbl WHERE action_code = 'APPROVE';
I wish I could count the number of the impact of each action_code "APPROVE", where the first "APPROVE" impact / occurrence with a SEQ of '2', would have a number of impact of '1', and the following, with a SEQ 3, would be the 2nd impact / occurrence of the string "APPROVE" and therefore would have a number of the impact of the '2 '.
I don't know if my sample data are too basic to be able to generate that info?
Any advice would be much appreciated.
Thank you!
Hello
Do you want results as follows:
A_NUM DOCNO ACTION_ ACTION_DATE SEQ
---------- ---------- ------- -------------------- ----------
1 123456 APPROVE 2 MAY 2013 14:59:47 2
2 123456 APPROVED MAY 2, 2013 16:25:14 3
where the a_num column is generated by the query?
You can use the ROW_NUMBER analytic function for this:
SELECT ROW_NUMBER () OVER (ORDER BY seq) AS a_num
, a.*
Of approval_tbl one
WHERE action_code = 'APPROVE '.
ORDER BY seq - if desired
;
Tags: Database
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