Copy value across tables

I need to update rows of a table based on values in another. I've googled this all morning but cant find anything useful.

I have  Select statement where I can see all the records I need to update (below) but I cant seem to make an update query that updates only the records that are returned by the select statement.
Select tblA_CommonFeild, tblA_NeedsChanging, tblB_ReferenceFeild
From tblA, tblB
WHERE tblB_CommonFeild=tblA_CommonFeild AND tblB_ReferenceFeild = 'NewValue' AND tblA_NeedsChanging='OldValue'

Open in new window

LVL 2
iambagelsAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Jinesh KamdarCommented:
Try this.
UPDATE tblA INNER JOIN tblB ON tblA_CommonFeild = tblB_CommonFeild 
SET tblA.tblA_NeedsChanging = tblB.tblB_ReferenceFeild

Open in new window

0
Jinesh KamdarCommented:
Or you can try this as well.

UPDATE tblA A
SET tblA_NeedsChanging = (SELECT tblB_ReferenceFeild FROM tblB WHERE tblB_CommonFeild = A.tblA_CommonFeild)
WHERE EXISTS (SELECT 1 FROM tblB WHERE tblB_CommonFeild = A.tblA_CommonFeild)
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
iambagelsAuthor Commented:
thanks

i was trying to select from both tables
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Databases

From novice to tech pro — start learning today.