CTE Performance
SQL Server 2005 brings a new feature to T-SQL with Common Table Expressions, which make it possible for more complex subquery expressions than in previous versions. Recursion is a common use and Peter He takes a look at how well these new structures perform.
More RBAR and "Tuning" UPDATEs
SQL Server expert Jeff Moden discusses a common problem seen in many update statements.
SQL Server 2005 Best Practices
With SQL Server 2005 recently released, one of the things that many people are looking for are some guidelines for working with the new product. New author NandaKishore brings us a list of best practices that should give you a start.
Fuzzy Lookup and Fuzzy Grouping in SQL Server Integration Services 2005
This paper describes the Fuzzy Lookup and Fuzzy Grouping transformations that are part of SQL Server 2005 Integration Services (SSIS). These SSIS transformations are useful for improving the data quality of existing data as well as new data that is being loaded into your database.
Internals of DBM Failover / Role Switching
Understanding different types of failovers/Role Switching and How do they internally work in database mirroring.
A Common Architecture for Loading Data
Importing data files is always a challenge for a DBA, especially when the files might vary in format. Having one codebase is important and new author Mark Balasundram brings us the template for a high performance application to do just that.
Blogs
A Cloud Dependency Failure from Amazon
By Steve Jones
I went to sleep while reading a Kindle book on my phone. I know...
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...
Forums
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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