Performance Tuning

Technical Article

SQL Server 2005 Waits and Queues

  • Article

The methodology helps identify the areas of slow performance by looking at the problem from two directions called Waits and Queues. An analysis of Waits indicates where SQL Server is spending lots of time waiting. In addition, the biggest waits point out the most important or relevant Queues (that is, Performance Monitor counters and other data) for this workload.

2006-11-24

2,377 reads

SQLServerCentral Article

Gathering Metrics with SMO

  • Article

Keeping track of the performance of your SQL Servers requires metrics. There are many methods for doing this, but some type of automated process is essential these days with DBAs managing many servers. New author Allen White brings us a technique for doing this using SMO, the replacement for DMO in SQL Server 2005.

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2006-11-22

5,971 reads

SQLServerCentral Article

Analysis of SQL Server Performance Data

  • Article

Gathering performance data on your servers can be a cumbersome task without paying for an expensive tool. New author Jambu Krishnamurthy brings us a short tutorial on how you can gather this data from Perfmon and import it into SQL Server for reporting.

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2006-10-30

11,328 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