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Analyze and Correct a large SQL Server MSDB Database

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It has come to my attention that some of our MSDB databases are getting what I would consider large for a system database. Some of our MSDB databases are over 2 GB which is a little perplexing because I know we do not create any user defined objects in that database. Can you give me some insight into the issue? I know we have this issue with both SQL Server 2000 and 2005 instances.

2008-04-14

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Question of the Day

ORDER BY alias

There is a table tmp_tab: 

CREATE TABLE tmp_tab (
id int,
val int
);
INSERT INTO tmp_tab VALUES
(1, 1),
(2, NULL),
(3, 3),
(4, 4),
(5, 5);
You want to order the rows ids by the following expression: 
    ISNULL(val, id) + 1
Which of the following queries produces the expected ordering and why? (Select all correct)

See possible answers