Session settings

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How to find, compare and use the exact same session settings as another user in SQL Server

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When diagnosing issues in SQL Server I've found that sometimes I need to be able to mimic a user's session state when attempting to repeat an error they may be receiving. The smallest differences can completely change the outcome, so I need to ensure all the session settings (QUOTED_IDENTIFIER, ANSI_NULLS, and so forth) are identical between the production session and my test session. Is there an easy way to determine these settings with a single query?

2009-08-31

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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