Antipathy for Entity Attribute Value data models
EAV models have their uses but the costs are often hidden and if not hidden, more than anticipated.
2013-01-21
8,571 reads
Articles
The Data Scientist
Phil Factor on why Data Science is about much more than just clever visualizations and big data.
2013-01-21
229 reads
2013-01-21
1,562 reads
VARCHAR (MAX), NVARCHAR (MAX) and NTEXT Data Types
Despite NTEXT and TEXT being deprecated in SQL Server for some time they are still both used in production systems. In this article, I will briefly demonstrate the difference between a VARCHAR (MAX), NVARCHAR (MAX) and the NTEXT data types, and the impact on performance from using NTEXT/TEXT.
2013-01-21
6,201 reads
Working With Multi-Select Parameters for SSRS Reports
Multi-select parameters give your users control over their reports while reducing the number of reports they have to work with. This example demonstrates how to create a multi-select parameter list and pass the values to a stored procedure that will then populate the report.
2013-01-18
4,259 reads
Fun with ACID
What is ACID and why should we care? A look at the principal that drives all database and DB management software design: A.C.I.D.
2013-01-17
4,822 reads
Free eBook: SQL Server Execution Plans
Every Database Administrator, developer, report writer, and anyone else who writes T-SQL to access SQL Server data, must understand how to read and interpret execution plans. This book leads you right from the basics of capturing plans, through how to interrupt them in their various forms, graphical or XML, and then how to use the information you find there to diagnose the most common causes of poor query performance, and so optimize your SQL queries, and improve your indexing strategy.
2013-01-17
7,238 reads
Handling Errors in SQL Server 2012
The error handling of SQL Server has always been somewhat mysterious. Now at last, the THROW statement has been included in SQL Server 2012 that, when combined with the TRY...CATCH block, makes error handling far easier. Robert Sheldon explains all.
2013-01-17
8,709 reads
SQL Server T-SQL Tuning – NOT IN and NOT Exists
Following on from the previous TSQL performance tuning article in this series, we now focus on the important topic of T-SQL “Not IN” And “Not Exists “
2013-01-16
7,301 reads
SQLServerCentral Runs sp_Blitz - Reliability
The second article that examines the output of the sp_Blitz script™ run against SQLServerCentral's database servers.
2013-01-15
5,603 reads
Blogs
A Cloud Dependency Failure from Amazon
By Steve Jones
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Deploying AI in logistics (the unfiltered version)
A conversation with Jan Laš, CIO at HOPI, about what deploying a data agent...
T-SQL Tuesday #198 Invitation: How Do You Detect Data Changes?
It's time for T-SQL Tuesday #198! This month's topic is change detection. The post T-SQL...
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SPAM Issues May 2026
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SQL Password enforcing
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SQL Password enforcing
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Question of the Day
Creating a JSON Document III
I have this data in a table called dbo.NFLTeams
TeamID TeamName City YearEstablished ------ -------- ---- --------------- 1 Cowboys Dallas 1960 2 Eagles Philadelphia 1933 3 Packers Green Bay 1919 4 Chiefs Kansas City 1960 5 49ers San Francisco 1946 6 Broncos Denver 1960 7 Seahawks Seattle 1976 8 Patriots New England 1960If I run this code, how many rows are returned?
SELECT TOP 2
json_objectagg('Team' : TeamName)
FROM dbo.NFLTeams;
See possible answers