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
Indexing
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)
1,422 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
1,856 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
991 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)
3,762 reads
2005 Clean Indexes For All Databases on a Server
Check Indexes on all databases and rebuild/reindex based on fragmentation
2008-02-01 (first published: 2007-04-05)
1,458 reads
2007-04-30 (first published: 2007-04-03)
1,689 reads
SQL Server 2005: Script all Primary Keys
Since it is not possible to script only the primary keys of all tables with the SQL Server 2005 Management Studio, here a small script to get the create scripts for all existing primary keys of the current database.
2007-03-28 (first published: 2007-03-09)
4,302 reads
Script to aid in Indexing Strategy
When AUTOSTATS is used in a database, we can sometimes use these automatically generated statistics to find columns where SQL Server has built statistics on non-indexed columns that may benefit from an index. This script finds these columns and displays the selectivity of them. This script can be useful in troubleshooting poorly performing databases by […]
2007-04-09 (first published: 2007-02-20)
1,756 reads
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Question of the Day
Using OPENJSON
I have some data in a table that looks like this:
BeerID BeerName brewer beerdescription 1 Becks Interbrew Beck's is a German-style pilsner beer 2 Fat Tire New Belgium Toasty malt, gentle sweetness, flash of fresh hop bitterness. 3 Mac n Jacks Mac & Jack's Brewery This beer erupts with a floral, hoppy taste 4 Alaskan Amber Alaskan Brewing Alaskan Brewing Amber Ale is an "alt" style beer 8 Kirin Kirin Brewing Kirin Ichiban is a Lager-type beerIf I run this, what is returned?
select t1.[key]
from openjson((select t.* FROM Beer AS t for json path)) t1 See possible answers