2025-12-12
285 reads
Isolation Levels
Reduce SQL Server Blocking with READ_COMMITTED_SNAPSHOT
This article explores how enabling READ_COMMITTED_SNAPSHOT on your SQL Server database might ease excessive blocking.
2024-08-19
2023-09-04
431 reads
Concurrency Control in SQL Server
Learn a bit about concurrency problems in SQL Server, the issues they create, and the different isolation levels that help you solve them.
2020-05-12
43,331 reads
2020-02-18
1,133 reads
2019-10-28
7,313 reads
Comparison of SQL Server Serializable and Snapshot isolation levels
Both Serializable and Snapshot isolation levels exclude concurrency issues such as Dirty Reads, Non-repeatable Reads and Phantoms. However the way in which they deal with such issues is quite different. In this article, Sergey Gigoyan explains the main differences between the two.
2016-01-13
3,453 reads
2014-08-14
1,969 reads
Transaction Isolation Levels
An examination into how the various transaction isolation levels affect locking (and blocking)
2014-02-13
9,075 reads
SQL Server Transactions and Locking – Part 2
This article looks at SQL Server locking and transaction isolation levels, how to set the transaction isolation level, and how some isolation levels use locking, while others use row versioning. It also explains what type of locks data update requires.
2013-07-17
3,573 reads
Blogs
The SUM of Nothing: #SQLNewBlogger
By Steve Jones
I caught this interesting item over on Pinal Dave’s blog: Eleven Interview Questions that...
How to Move the SSMS Status Bar to the Top and Color-Code SQL Server Connections
By Hemantgiri
I use color-coded connections in SSMS to distinguish Production, Pre-Production, UAT, and Development. But...
Forums
Split Large Queries in Athena with a Simple Modulo Trick
Comments posted to this topic are about the item Split Large Queries in Athena...
Finding Trailing Spaces
Comments posted to this topic are about the item Finding Trailing Spaces
Question of the Day
Finding Trailing Spaces
I have some data in a SQL Server 2025 database. It looks like this for the dbo.Customer table:
CustomerID CustomerName PreferredName 1 Steve Steve 2 Andy Andy 3 Brian Brian 4 Allan Allan 5 Devin Devin 6 Steve Steve 7 Sally SallyI want to detect which names have a single trailing space. The CustomerName is a varchar() and the PreferredName is a CHAR(). Does this query detect the problem rows?
SELECT
CustomerID,
CustomerName,
PreferredName
FROM Customer
WHERE CustomerName <> RTRIM(CustomerName)
OR PreferredName <> RTRIM(PreferredName); See possible answers