Scripts

Technical Article

Detect the Amount of Wasted Data Space in a Table for 2000

SP_WASTED_SPACE will run through each column in your database and print a report of all the character columns. It will then print a report with :* The maximum length that a column is storing* The average length of data stored in each column* The amount of wasted space in each column* Hints on how to […]

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2002-03-14

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Technical Article

Display Rows/Space Used by all user tables

This procedure will display the rows, reserved, data, index and unused space used in KB for all user tables in the database.  The idea is to call sp_spaceused repeatedly.  Limitation: certain versions of sp_spaceused will truncate the table name to 20 characters.Speed will depend on current activity level and locking in the database.  It will […]

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2002-03-14

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Technical Article

Check for orphaned user or sid in syslogins

When rebuilding a server or setting up a backup or DR server the logins need to be added into master and synchronised with the user databases.Inevitably there are orphaned users is sysusers or the sid's do not match with syslogins.I use this stored procedure to check for a particular user when the user experiences a […]

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2002-03-07

831 reads

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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