Avoid using NOLOCK on SQL Server UPDATE and DELETE statements
Occasionally I come across UPDATE and DELETE statements where the target SQL Server table is referenced with the NOLOCK hint. Does this hint help or hurt performance in this case?
SQL Saturday #269 - Exeter, UK
SQL Saturday is coming to Exeter on March 22, 2014. Join Red Gate's David Atkinson and the rest of the speakers at this free day of SQL Server training and networking, organized by SQL South West.
Geeky Entertainment
As a break from work, this week Steve Jones wants to know what you wish for. Are there comic book, science fiction, or technological thrillers you'd like to see made into movies?
See Grant Fritchey and Steve Jones at SQL Intersection
Come see Grant Fritchey and Steve Jones (from Red Gate Software) and many more SQL Server experts while you enjoy spring in Orlando, FL at SQL Intersection.
Calculating Gaps Between Overlapping Time Intervals in SQL
There are a number of real-life reporting tasks in SQL that require a 'gaps and islands' analysis. There are a number of techniques around that work, but finding ones that scale well makes for a tougher, but interesting, challenge.
Fixing CREATE TABLE
Steve Jones has a problem with the inconsistency of the CREATE TABLE statement in SQL Server and has an idea on what to do.
Identify the Backup used to Restore the Database
This article will help us identify the backup which was used to restore the database. This may seem simple when the database backup is from the same server but the complications begin when the backup is not from the same server.
DBAs Checklist for Designing and Reviewing SQL Server System Architectures
In this tip, Sadequl Hussain will try to list a few areas DBAs need to cover when they are designing new systems or reviewing proposed solutions.
Caching
A SQL Server database can easily be seen as a bottleneck as all data must be retrieved from a single machine. However a caching strategy in your application and alleviate load and improve performance.
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