Comments on: SQL SERVER – Puzzle – Computed Columns Datatype Explanation

By: Rohit

Rohit — Tue, 09 Dec 2008 14:48:37 +0000

how can i change the datatype of a computed coulmn.

By: SQL SERVER - Puzzle - Solution - Computed Columns Datatype Explanation Journey to SQL Authority with Pinal Dave

Mon, 29 Sep 2008 01:30:50 +0000

[...] 29, 2008 by pinaldave Just a day before I wrote article SQL SERVER – Puzzle – Computed Columns Datatype Explanation which was inspired by SQL Server MVP Jacob Sebastian. I suggest that before continuing this article [...]

By: pinaldave

pinaldave — Sat, 27 Sep 2008 07:32:31 +0000

Hi Jacob,

You are correct.

TinyInt can not be defined as SIGNED. It is always UNSIGNED. I have fixed it original post.

SQL Server 2008 does not allow as well.

http://msdn.microsoft.com/en-us/library/ms187745.aspx

Regards,
Pinal

By: Kinjal

Kinjal — Sat, 27 Sep 2008 07:18:34 +0000

Hi Dave,

This Knowledge Sessions are quite helpful for us. we can take a break out of our Schedule to Reply & Learn somthin New…

Keep it up Guru….

I guess it would be option a) It will error out.

Good Day…

By: Jacob sebastian

Jacob sebastian — Sat, 27 Sep 2008 05:44:02 +0000

This discussion is getting very interesting. The same precedence rules applicable for a CASE expression too.

For example:
DECLARE @var INT
SELECT @var = 1

SELECT
CASE @var
WHEN 1 THEN 1
WHEN 2 THEN 5.0
END AS Value
/*
Value
—————————————
1.0

Returns 1.0 instead of 1 because the second case
expression returns a float
*/

btw: how do you define a TINYINT data type as UNSIGNED? I don’t find this documented: http://msdn.microsoft.com/en-us/library/aa933198(SQL.80).aspx