I have two tables A and B where A is a huge table with thousands of rows, B
is a small table with only a couple of entries.
I want to do something like
SELECT
A.ID
A.Name
FROM
A JOIN B ON (A.ID = B.ID)
And on the other hand I can have something like this
SELECT
A.ID
A.Name
FROM
A
WHERE
A.ID IN (B_Id_List)
B_Id_List is a string concatenation of B.ID. (ie, 1,2,3,4,5 ...)
Which one is faster, more efficient?
And if you could, which one is faster/more efficient under MS SQL Server 7?
I am trying to develop a cross platform query, that is why I need to
concern with performance under different databases.
Thanks a lot!
Wei