2013-03-08 (first published: 2009-10-02)
3,400 reads
Indexing
2009-09-30
3,774 reads
Keep Your SQL Server Indexes Fragmentation Free
Routine maintenance can keep index fragmentation to a minimum—with some help from an index-defragmenting script.
2009-09-22
5,457 reads
Understanding Scans And Seeks
Whether a query uses Scan or Seek can have a big impact on the cost of excuting that query. This article examines when each is used and which is optimal.
2009-09-10
6,054 reads
Back to basics: Optimizing SQL Server indexes
When created and maintained correctly, indexes help SQL Server retrieve data quickly. See how to ensure your SQL Server environment is running up to speed.
2009-08-21
6,622 reads
2009-07-29
4,351 reads
Retaining historical index usage statistics for SQL Server - Part 3
In this, the third of the four part series on persisting the rowset results from the indexing Dynamic Management Views cached in temporary internal SQL Server structures we will explore what is required to store the missing index-related metadata.
2009-07-20
2,160 reads
2009-07-13
4,100 reads
2009-07-17 (first published: 2009-07-08)
920 reads
2009-06-23
3,949 reads
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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