TABLESAMPLE returns a random sample of rows by percent or row count. My examples show why the same query returns a different number of rows each time.
SQL SERVER – 2005 Find Table without Clustered Index – Find Table with no Primary Key
A query on sys.indexes to find every table without clustered index in a database, why heaps can slow you down, and how to pick a clustered key.
SQL SERVER – Change Default Fill Factor For Index
The Default Fill Factor in SQL Server is 0. Change it with sp_configure to leave free space on index pages and reduce page splits. I like mine at 90.
SQL SERVER – Stored Procedure to display code (text) of Stored Procedure, Trigger, View or Object
Need to display code of a stored procedure, trigger, view or function? The system stored procedure sp_helptext prints the text of any unencrypted object.
SQL SERVER – 2005 Retrieve Configuration of Server
To retrieve the full configuration of server options in SQL Server 2005, turn on show advanced options and run sp_configure. Change any option the same way.
Composite Keys: Match Complete Pairs Instead of Separate Lists
Composite keys need a complete pair match when the allowed values are defined together. I don’t split the components into independent lists. Doing so can admit combinations that were never allowed.
A Quote of the Day From a Table, With No Repeats Until All Are Used
Build a quote of the day table that rotates without repeats, handles concurrent requests, and supports a stable date-based selection.