On Tue, 2002-12-10 at 23:20, Wei Weng wrote:
> 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)
How is this query any different from:
SELECT
A.ID,
A.Name
FROM
A,
B
WHERE
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.
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| Ron Johnson, Jr. mailto:ron.l.johnson@cox.net |
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| |
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