SQL Server non-clustered indexes for query optimization
Optimize SQL Server non-clustered indexes and queries by considering index fields, compound indexes and SQL Server statistics' impact on non-clustered indexes.
2008-03-05
3,828 reads
Indexing
2008-02-19
3,140 reads
Using Included Columns in SQL Server 2005
One of the new features found in SQL Server 2005 is the ability to add additional columns, called Included Columns, to a non-clustered index. This article will explain the advantages of using included columns and what impact they will have on your database.
2008-01-28
3,277 reads
Generate index on foreign key columns
Script find all foreign key without index in database and create new one for them.
2012-03-29 (first published: 2008-01-25)
3,424 reads
SQL Server clustered index design for performance
Find why SQL Server clustered index design should be narrow and static and how clustered indexes affect many-to-many tables to improve database performance.
2008-01-16
3,939 reads
SQL Server Indexes: The Basics
Indexes directly affect the performance of database applications. This article uses analogies to describe how indexes work. The estimated execution plan feature of the Query Window is utilized to compare the performance of two queries in a batch.
2007-12-04
5,686 reads
2007-12-21 (first published: 2007-10-25)
1,449 reads
Prioritize Missing Index Recommendations 2 (2005)
This is an enhanced version of my previous script: Prioritize Missing Index Recommendations (2005).To aid in evaluation of whether the recommended index is reasonable, I have added :1. counts for key columns and the total columns of the recommended index 2. the length/bytes for both key and all columns Note this is 'per row', not […]
2007-08-17
1,874 reads
Prioritize Missing Index Recommendations (2005)
To report indexes proposed by the database engine that have highest probable user impact. Note that no consideration is given to 'reasonableness' of indexes-- bytes, overall size, total number of indexes on a table, etc. Intended to provide targeted starting point for holistic evaluation of indexes.
2007-08-17
1,012 reads
Find Unindexed Foreign Keys (2005)
This script will find foreign keys (on referencing table) that are not indexed in SQL Server 2005.
2011-12-20 (first published: 2007-08-10)
3,779 reads
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Forums
Using CHOOSE()
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Question of the Day
Using CHOOSE()
We have this code that sets some status values and then queries them using the CHOOSE() function in SQL Server 2025.
CREATE TABLE Status
(
StatusID INT,
StatusDescription VARCHAR(20)
);
GO
INSERT dbo.Status
(
StatusID,
StatusDescription
)
VALUES
(0, 'Uncategorized'),
(1, 'Active'),
(2, 'Inactive'),
(3, 'Temp');
GO
SELECT CHOOSE(StatusID, 'Unknown', 'Active', 'Inactive', 'Temporary')
FROM Status;
When the SELECT runs, what is returned? See possible answers