sql select statement

table a has a column a_id;
table b has a column b_id;
I need select the rows where the a_id=b_id;

select * from a where a.a_id=b.b_id
right?
keepworkingAsked:
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.

Daniel ReynoldsSoftware Applications Developer / IntegratorCommented:
that should work fine
0
G_Hosa_PhatCommented:
That'll work if you want to go through table b row-by-row.  What you may want to do instead is use some type of JOIN statement.  Since you tagged MySQL as the database type, check the My SQL Reference Manual for more information on how to do that.
0
SharathData EngineerCommented:
Where is table b in your query? Any of these will work.
select * from a where a_id in (select b_id from b)

Open in new window

select a.* from a inner join b on a.a_id = b.b_id

Open in new window

select * from a where exists (select 1 from b where a_id = b_id)

Open in new window

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
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
MySQL Server

From novice to tech pro — start learning today.