Index Fragmentation for All Databases
Returns Top 25 fragmented indexes complete with full object name and index name.
2011-04-29 (first published: 2009-05-29)
9,988 reads
Indexing
Don’t Make Dumb Mistakes by Duplicating Indexes
Just today, I was reviewing the indexing of a database used by a third-party application. As part of my review, I ran a script against it that is used to identify duplicate indexes. The script I used was written Paul Nielsen, the author of the SQL Server...
2009-04-20
3,400 reads
2009-05-14 (first published: 2009-04-08)
1,989 reads
2009-03-20
3,861 reads
How to create indexes on computed columns in SQL Server
There are certain requirements for creating indexes on computed columns and this tip shows you want needs to be done.
2009-03-18
3,781 reads
Reasons Why You May Not Want to Use a Heap
For a book project I am working on, I have started compiling a list of reasons why heaps aren't usually a good choice when designing a database. Now, I didn't say that heaps are always bad, but in most cases, I think they should be avoided so pleae read the list to see why.
2009-03-10
3,333 reads
2009-02-03
4,328 reads
Obtaining Index Usage Information
This article shows how the sys.dm_db_index_usage_stats DMV can be used to tune your indexes, and maximize the performance of your database
2009-01-15
2,706 reads
Finding a better candidate for your clustered indexes
When creating tables it is difficult to determine exactly how the data will be accessed. Therefore when clustered indexes are chosen they are often just the ID column that makes the row unique. This may be a good choice, but once the application has been used and data access statistics are available you may need to go back and make some adjustments to your tables to ensure your clustered indexes are providing a benefit and not a drain on your applications.
2008-12-26
3,880 reads
2008-12-19
3,755 reads
Blogs
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Forums
Can an Azure App Service Managed Identity be used for SQL Login?
I'm fairly certain I know the answer to this from digging into it yesterday,...
Azure Synapse database refresh
Hi Team, I am trying to refresh the Azure Synapse Dedicated pool from production...
how to write this query?
hi everyone I am not sure how to write the query that will produce...
Question of the Day
Fun with JSON I
I have some data in a table:
CREATE TABLE #test_data
(
id INT PRIMARY KEY,
name VARCHAR(100),
birth_date DATE
);
-- Step 2: Insert rows
INSERT INTO #test_data
VALUES
(1, 'Olivia', '2025-01-05'),
(2, 'Emma', '2025-03-02'),
(3, 'Liam', '2025-11-15'),
(4, 'Noah', '2025-12-22');
If I run this query, how many rows are returned?
SELECT *
FROM OPENJSON(
(
SELECT t.* FROM #test_data AS t FOR JSON PATH
)
) t; See possible answers