Subtracting One Row From Another Row

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Subtracting One Row From Another Row

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goodyear
Starting Member

2 Posts

Posted - 2012-07-04 : 15:45:33

Hi Everyone,

I need help on how to subtract a value from a row on another row.

For example:

I have a simple table called "COST."

In my COST table I need to subtract the cost of Calif. - SoCal, so it would (2,000-500=1500).

--TABLE COST---

Location COST
ROW 1 Calif. 2,000
ROW 2 SoCAL 500

On my final output what I would ultimately want is to have the following.

Location COST
ROW 1 Calif. 2,000
ROW 2 SoCAL 500
Row 3 Calif_2 1,500

Is this possible? Thanks in advance!

My

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-07-04 : 16:54:10

yep possible


SELECT *,t1.Cost AS PrevCost
FROM table t
OUTER APPLY (SELECT SUM(CASE WHEN Location LIKE 'Calif%' THEN COST ELSE -1 * COST END) AS Cost
             FROM Table
             WHERE PK < t.PK
            )t1

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

goodyear
Starting Member

2 Posts

Posted - 2012-07-04 : 20:44:03

Thanks Visakh for responding.

I tried your suggestion, but and it error out. I'm not sure if it's my syntax or that OUTER APPLY is not recognized in Oracle.

CREATE TABLE GY_COST AS
SELECT *,t1.cost AS PrevCost
FROM table t
OUTER JOIN (SELECT SUM(CASE WHEN LOCATION LIKE 'CALIF%' THEN COST ELSE -1 * COST END) AS COST
FROM TABLE
WHERE ROWNUM<t.ROWNUM) t1;

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-07-04 : 23:37:16

you're in wrong forum then!
This is MS SQL Server forum so please post in Oracle forums like www.orafaq.com for Oracle related help.

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

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