Column Update Oracle SQL - sql

Question

I have the data in the following format:
Tran No Date Store ID Register ID Tender
01 23-10-2015 1000 001 CASH
01 23-10-2015 1000 001 CRDT
02 23-10-2015 1000 001 CASH
02 23-10-2015 1000 001 GIFT
A new column has been added (Tran Seq) to the table
Such that the new data would become like
Tran No Date Store ID Register ID Tender Tran Seq
01 23-10-2015 1000 001 CASH 0
01 23-10-2015 1000 001 CRDT 1
02 23-10-2015 1000 001 CASH 0
02 23-10-2015 1000 001 GIFT 1
For every same TRAN NO, DATE, STORE ID and REGISTER ID, each line item would get a new sequence number in the field Tran Seq.
How do i achieve the above mentioned results?

Answer 1

You could use ROW_NUMBER() analytic function:
For example,
Setup
CREATE TABLE t
(tran_no NUMBER,
"DATE" VARCHAR2(10),
store_id NUMBER,
Register_ID NUMBER,
Tender varchar2(4));
INSERT ALL
INTO t (tran_no, "DATE", store_id, Register_ID, Tender)
VALUES (01, '23-10-2015', 1000, 001, 'CASH')
INTO t (tran_no, "DATE", store_id, Register_ID, Tender)
VALUES (01, '23-10-2015', 1000, 001, 'CRDT')
INTO t (tran_no, "DATE", store_id, Register_ID, Tender)
VALUES (02, '23-10-2015', 1000, 001, 'CASH')
INTO t (tran_no, "DATE", store_id, Register_ID, Tender)
VALUES (02, '23-10-2015', 1000, 001, 'GIFT')
INTO t (tran_no, "DATE", store_id, Register_ID, Tender)
VALUES (02, '23-10-2015', 1000, 001, 'CRDT')
SELECT * FROM dual;
Query
SQL> SELECT t.*,
2 row_number() OVER(PARTITION BY tran_no,
3 "DATE",
4 store_id,
5 register_id
6 ORDER BY tender) - 1 tran_seq
7 FROM t;
TRAN_NO DATE STORE_ID REGISTER_ID TEND TRAN_SEQ
---------- ---------- ---------- ----------- ---- ----------
1 23-10-2015 1000 1 CASH 0
1 23-10-2015 1000 1 CRDT 1
2 23-10-2015 1000 1 CASH 0
2 23-10-2015 1000 1 CRDT 1
2 23-10-2015 1000 1 GIFT 2
SQL>
Note :
You cannot have a space between column names. I have used underscore instead.
You cannot used Oracle keywords. If you want to use, then you need to use double-quotation marks. For example, "DATE" column. remember, you need to use the double-quotation marks everywhere you make the reference.
From documentation on Database Object Naming Rules:
A quoted identifier begins and ends with double quotation marks ("). If you name a schema object using a quoted identifier, then you must use the double quotation marks whenever you refer to that object.
UPDATE
OP wants to update the new column with the sequence generated. You could use MERGE statement.
SQL> ALTER TABLE t ADD tran_seq NUMBER;
Table altered.
SQL> MERGE INTO t
2 USING(
3 SELECT TRAN_NO, "DATE", STORE_ID, REGISTER_ID, TENDER,
4 row_number() OVER(PARTITION BY tran_no,
5 "DATE",
6 store_id,
7 register_id
8 ORDER BY tender) - 1 tran_seq
9 FROM t
10 ) s
11 ON (t.tran_no = s.tran_no
12 AND t."DATE" = s."DATE"
13 AND t.store_id = s.store_id
14 AND t.register_id = s.register_id
15 AND t.tender = s.tender
16 )
17 WHEN MATCHED THEN
18 UPDATE SET t.tran_seq = s.tran_seq
19 /
5 rows merged.
SQL> SELECT * FROM t ORDER BY tran_no, tran_seq;
TRAN_NO DATE STORE_ID REGISTER_ID TEND TRAN_SEQ
---------- ---------- ---------- ----------- ---- ----------
1 23-10-2015 1000 1 CASH 0
1 23-10-2015 1000 1 CRDT 1
2 23-10-2015 1000 1 CASH 0
2 23-10-2015 1000 1 CRDT 1
2 23-10-2015 1000 1 GIFT 2

Answer 2

You can use row_number with partition by clause
select tran_no,date,store_id,register_id,tender, row_number() over(partition
by tran_no,date,store_id,register_id order by tran_no)-1 tran_seq
from table_name

Answer 3

Note: I realized it lately after posting this answer that mine solution will work on MSSQLServer. So check #Lalit's answer for Oracle.
Hi you would need to write a script to do that, as this has many steps.
You need to create a temp table where you will store transit result like below.
To clean off table if it exist already..
IF OBJECT_ID('tempdb..##abc') IS NOT NULL
DROP TABLE ##abc
Now create a temp table with following query..
Declare #sql as nvarchar(max)
set #sql = N'select * into ##abc from (SELECT t.*,
row_number() OVER(PARTITION BY [Tran No],
DATE,
[Store ID],
[Register ID]
ORDER BY Tender) - 1 tran_seq
FROM #temp t) as T'
EXECUTE sp_executesql #sql
You may check this table, if created.
select * from ##abc
Now drop your existing table
drop table YourTableName
Now just recreate same from temp table.
select * into YourTableName from (select * from ##abc) as T
It's done. You may query your original table now.
select * from YourTableName