mysql query - accessing field without affecting output

I have 2 tables in mysql: tableA and tableB

tableA: idA
tableB: idB, name

Now i want to fire following query:

SELECT * FROM tableA WHERE idA in (1, 2, 3, 4);

idA and idB are exactly same. I want to access "name" 开发者_如何学Pythonfield of tableB in the above query.

How do i do this???

Thanks alot for help Regards

Use a MySQL JOIN

    SELECT tableB.name 
      FROM tableA 
INNER JOIN tableB ON tableA.idA=tableB.idB 
     WHERE idA in (1, 2, 3, 4);

Why select from TableA if you only need the id which is already in tableB?

SELECT idB, name FROM tableB where idB in (1, 2, 3, 4)

If you need to refer to the id field as idA, you can write

SELECT idB as idA, name FROM tableB where idB in (1, 2, 3, 4)

Thanks alot for help...

I just forgot the basic thing (thanks @yc you reminded me):

SELECT idA, name FROM tableA, tableB WHERE idA in (1, 2, 3, 4) and idA = idB;

Regards