Solved

sql query

Posted on 2016-11-07
7
49 Views
Last Modified: 2016-11-23
hi experts,

 how can i fetch data from two columns present in two different table and update a third table's two columns with that data???
 Thanks.
0
Comment
Question by:sam shah
7 Comments
 
LVL 51

Expert Comment

by:Ryan Chong
ID: 41876739
you need to tell us what's the column(s) to be linked with these first 2 tables.
0
 
LVL 49

Expert Comment

by:Vitor Montalvão
ID: 41876752
In a very generic way:
UPDATE Table1
SET ColumnName = (SELECT Table2.ColumnName
                FROM Table2
                        INNER JOIN Table3 ON Table2.ID = Table3.ID)

Open in new window

If you give us more information we can give you a more precise answer.
0
 

Author Comment

by:sam shah
ID: 41876897
MERGE INTO table1 a
   USING table2 b
   ON (b.col2 = a.col1)
   WHEN MATCHED THEN
      UPDATE
         SET a.col3 = b.col4

"how can i use cursor for this instead of merge'??
0
Enterprise Mobility and BYOD For Dummies

Like “For Dummies” books, you can read this in whatever order you choose and learn about mobility and BYOD; and how to put a competitive mobile infrastructure in place. Developed for SMBs and large enterprises alike, you will find helpful use cases, planning, and implementation.

 
LVL 28

Expert Comment

by:Pawan Kumar
ID: 41876900
Do not use cursor they are costly.. Query will suffice your problem.
0
 
LVL 49

Expert Comment

by:Vitor Montalvão
ID: 41876901
So where's the 3rd table in your example?
Also, MERGE means UPDATE when exists and INSERT when not.

This is different from your main question.
Please confirm what you really want.
0
 
LVL 28

Accepted Solution

by:
Pawan Kumar earned 500 total points
ID: 41876905
Try something like.. Also provide table info and few rows.

;WITH CTE AS
(
	   SELECT b.col4 , b.col3
	   FROM table1 a
	   INNER JOIN table2 b
	   ON b.col1 = a.col1
)
UPDATE c
SET c.col4 = d.col4
FROM table3 c
INNER JOIN CTE d ON d.col3 = c.col3

Open in new window

0
 
LVL 49

Expert Comment

by:Vitor Montalvão
ID: 41895763
Sam, is your issue solved?
If it is please close this question by accepting one or more comments as solution.
If it is not solved please tell us what's missing so we can help you further.
0

Featured Post

U.S. Department of Agriculture and Acronis Access

With the new era of mobile computing, smartphones and tablets, wireless communications and cloud services, the USDA sought to take advantage of a mobilized workforce and the blurring lines between personal and corporate computing resources.

Question has a verified solution.

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

Suggested Solutions

Why is this different from all of the other step by step guides?  Because I make a living as a DBA and not as a writer and I lived through this experience. Defining the name: When I talk to people they say different names on this subject stuff l…
Load balancing is the method of dividing the total amount of work performed by one computer between two or more computers. Its aim is to get more work done in the same amount of time, ensuring that all the users get served faster.
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.
Via a live example, show how to extract insert data into a SQL Server database table using the Import/Export option and Bulk Insert.

679 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