Check for Existing Data in a table (SQL 2008)

I first want to check if data exists in a table A, then if yes I want to truncate data in table B and replace with the data in table A. If No I do not want to do anything.
I believe there is some sort of row function or exist statement that is needed, however my attempts are causing errors. Please advise. Thanks
SeTechAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
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.

Lee SavidgeCommented:
if exists (select top 1 * from tableA)
begin
  truncate table tableA
  insert into tableB
  select * from tableA -- this assumes your table structures are the same. If not, select only the columns you want
end

Open in new window

0
SeTechAuthor Commented:
Thanks and one additional quesiton on your post. Should the truncate table tableA really be truncate table tableB as that is the table I want to update. So most likley that was just a typo?
0
Lee SavidgeCommented:
A typo. Truncate tableB.

Obviously you will want to test this first.
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
SeTechAuthor Commented:
Thanks worked PERFECTLY
0
Lee SavidgeCommented:
Splendid!

Glad to be of help :)
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
Microsoft SQL Server

From novice to tech pro — start learning today.