SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Updating a column in one table from another table


Updating a column in one table from another table

Author
Message
gautham.gn
gautham.gn
SSC Rookie
SSC Rookie (42 reputation)SSC Rookie (42 reputation)SSC Rookie (42 reputation)SSC Rookie (42 reputation)SSC Rookie (42 reputation)SSC Rookie (42 reputation)SSC Rookie (42 reputation)SSC Rookie (42 reputation)

Group: General Forum Members
Points: 42 Visits: 86
We have two tables with names X and Y.
X has a,b columns. And Y has c,d columns.
I want to update b column in X table with the values from d column in Y table on condition X.a=Y.c.

Can u help me with this query??
Thanks,,
ChrisM@Work
ChrisM@Work
SSCoach
SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)

Group: General Forum Members
Points: 16584 Visits: 19557
Check in Books Online for UPDATE, specifically UPDATE FROM. If you are still unsure, then take the time to read the posting etiquette article linked in my signature "please read this", and post DDL for your two tables with scripts to populate them with sample data.

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
suneel kamavaram
suneel kamavaram
Say Hey Kid
Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)Say Hey Kid (697 reputation)

Group: General Forum Members
Points: 697 Visits: 614
UPDATE x SET x.b = y.d
FROM TABLE1 x
JOIN table2 y ON x.a = y.c
Jeff Moden
Jeff Moden
SSC Guru
SSC Guru (88K reputation)SSC Guru (88K reputation)SSC Guru (88K reputation)SSC Guru (88K reputation)SSC Guru (88K reputation)SSC Guru (88K reputation)SSC Guru (88K reputation)SSC Guru (88K reputation)

Group: General Forum Members
Points: 88192 Visits: 41128
Just to be clear, Chris was trying to get the OP to teach themselves how to answer such simple questions on their own instead of making them permanently dependent on the kindness of others on the web. Books Online is a very good tool for learning such basics and more. I'm amazed at how many people that are using SQL Server that don't even know what Books Online is.

@gautham.gn,

Two questions for you now that you have the coded answer to your question... 1) Do you understand all of the parts of that code and why it works and 2) do you know what Books Online actually is?

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
If you think its expensive to hire a professional to do the job, wait until you hire an amateur. -- Red Adair

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search