Solved

Add values from Col 5 to values in col 6 and put them into col 7 in the SAME oracle Table

Posted on 2016-08-22
7
58 Views
Last Modified: 2016-08-23
Hi experts,

I have a table Alpha, it has col_1, Col_2, Col_3, Col_4, Col_5, Col_6, Col_7. The datatype in each column is number (10).

I want to add values in Col_5 with values in Col_6 and store the result in col_7 for each row in the table, taking into account NULL values in either column (Col_5, Col_6).  We are adding numbers only. No data conversion. It could be a an update statement or Merge statement.

I tried this, but  did not work.

Update Alpha set Col_7 = ((Select Case when col_5 = -1 or col_6 = -1 then -1
                                                               else  col_5 + col_6
                                                       End)
                                             From Alpha);

Please help.

Thanks
0
Comment
Question by:KamalAgnihotri
7 Comments
 
LVL 13

Expert Comment

by:Alexander Eßer [Alex140181]
ID: 41765501
update Alpha set .... From Alpha

I suppose you're getting an error?!
0
 

Author Comment

by:KamalAgnihotri
ID: 41765538
Alex, Yes I am getting an error. What is the solution.
0
 
LVL 34

Expert Comment

by:johnsone
ID: 41765590
I would guess this is what you are looking for:
UPDATE alpha 
SET    col_7 = CASE 
                 WHEN col_5 = -1 
                       OR col_6 = -1 THEN -1 
                 ELSE col_5 + col_6 
               END; 

Open in new window

Not sure why you have a sub-query.
0
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

 
LVL 32

Accepted Solution

by:
awking00 earned 500 total points
ID: 41765760
Since you indicated col_5 or col_6 might contain nulls, you may want to modify johnsone's update to this
UPDATE alpha
SET    col_7 = CASE
                 WHEN col_5 = -1
                       OR col_6 = -1 THEN -1
                 ELSE nvl(col_5,0 + nvl(col_6,0)
               END;
 You might also use decode in this instance
update alpha set col_7 = decode(col_5,-1,-1,col_6,-1,-1, nvl(col_5,0) + nvl(col_6,0))
0
 
LVL 34

Expert Comment

by:johnsone
ID: 41765814
I was assuming that the original was correct, just needed the syntax fixed.
0
 
LVL 37

Expert Comment

by:Geert Gruwez
ID: 41765853
what ? really ?

update alpha
set col7 = nvl(col5, 0) + nvl(col6, 0)

i guess I spoiled your homework now
1
 

Author Closing Comment

by:KamalAgnihotri
ID: 41766674
Thanks. That worked.
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
VB.Net - Oracle BulkCopy from CSV Date Format 7 61
Oracle - SQL Query with Function 3 36
Oracle DBLINKS From 11g to 8i 3 35
error in my cursor 5 31
This article started out as an Experts-Exchange question, which then grew into a quick tip to go along with an IOUG presentation for the Collaborate confernce and then later grew again into a full blown article with expanded functionality and legacy…
Introduction A previously published article on Experts Exchange ("Joins in Oracle", http://www.experts-exchange.com/Database/Oracle/A_8249-Joins-in-Oracle.html) makes a statement about "Oracle proprietary" joins and mixes the join syntax with gen…
This video shows, step by step, how to configure Oracle Heterogeneous Services via the Generic Gateway Agent in order to make a connection from an Oracle session and access a remote SQL Server database table.
This video shows how to copy an entire tablespace from one database to another database using Transportable Tablespace functionality.

772 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question