SQL Server Index Maintenance Performance Tuning for Large Tables
This article describes a real-world example of performance tuning index maintenance for a large table of approximately 1 billion rows.
2011-03-30
5,886 reads
Additional Articles
SSRS Reports Performance Debugging and Analysis
SSRS provides a very user friendly way to author and deploy reports. These reports can be accessed from different platforms where the reports are deployed - reports manager, SharePoint, stand-alone / distributed applications or programmatically using SSRS SOAP endpoints. Unfortunately, SSRS / BIDS does not provide any high-end debugging tools such as SQL Profiler for analyzing the performance of SSRS reports. In this tip we will look at different ways of debugging and analyzing SSRS reports performance using execution logs and freeware tools.
2011-03-28
5,640 reads
The default trace in SQL Server - the power of performance and security auditing
Since the introduction of SQL Server 2005, there is a simple lightweight trace that is left running by default on every SQL Server. This provides some very valuable information for the DBA about the running server, but it isn't well-documented. Feodor Georgiev reveals many of the secrets of this facility and shows how to get reports from it.
2011-03-28
3,896 reads
SQL Server 2008 Service Broker - Conversation Priorities
SQL Server 2008 Service Broker lets you process higher priority messages and conversations earlier than those with lower priority.
2011-03-25
2,326 reads
SQL Server random numerics data generation using CLR
You need to generate random data directly into SQL Server table columns or close to the database engine as variables or expressions. Looking at the SQL Server available functions, you notice that only RAND function offers support for random data generation. Although RAND([seed]) is a built-in function, it can only return a float value between 0 and 1, and has other limitations in regards to seed values. Because your table columns may be of various data types, and each data type may have a lower value and an upper value, you would prefer to create your custom random data generators. This is when SQL Server CLR functions come into play and provide a viable solution.
2011-03-24
3,275 reads
Naturally Increasing Data Value with Hierarchical Structures
Hierarchical structures have an inherent ability for significant data value increases beyond the data collected. This will be shown to exist in hierarchical structures and even more powerfully in their natural hierarchical processing capabilities. These will demonstrate flexible and efficient ways to increase data value automatically and will be discussed in this article. SQL will be used to perform a wide range of hierarchical processing operations that easily demonstrate these increasing data value capabilities.
2011-03-23
3,291 reads
Using Dynamic SQL in Stored Procedures
Dynamic SQL allows stored procedures to “write” or dynamically generate their SQL statements. The most common use case for dynamic SQL is stored procedures with optional parameters in the WHERE clause. These are typically called from reports or screens that have multiple, optional search criteria. This article describes how to write these types of stored procedures so they execute well and resist SQL injection attacks.
2011-03-22
7,301 reads
SQL Server Service Broker - External Activation
SQL Server Service Broker allows for two types of messaging activation, Internal Activation or External Activation. In this article we discuss External Activation.
2011-03-21
2,453 reads
Mouse Clicks, Reactive Extensions and StreamInsight Mashup
I had an hour spare this afternoon so I wanted to have another play with Reactive Extensions in .Net and StreamInsight. I also didn’t want to simply use a console window as a way of gathering events so I decided to use a windows form instead. The task I set myself was this. Whenever I click on my form I want to subscribe to the event and output its location to the console window and also the timestamp of the event.
2011-03-18
2,408 reads
SQL Server 2008 and 2008 R2 Integration Services - Managing Local Processes Using Script Task
SQL Server 2008 R2 Integration Services includes a number of predefined tasks that implement common administrative actions to help with data extraction, transformation and loading (ETL). While in a majority of cases they are sufficient to deliver required functionality, there might be situations where an extra level of flexibility is desired.
2011-03-17
3,010 reads
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Fun with JSON II
Comments posted to this topic are about the item Fun with JSON II
Changing Data Types
Comments posted to this topic are about the item Changing Data Types
Question of the Day
Fun with JSON II
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 t1.[key] AS row,
t2.*
FROM OPENJSON(
(
SELECT t.* FROM #test_data AS t FOR JSON PATH
)
) t1
CROSS APPLY OPENJSON(t1.value) t2; See possible answers