2016-01-19
1,341 reads
Locking
Prevent multiple users from running the same SQL Server stored procedure at the same time
There is a stored procedure that must be run by only one user at a time. In this tip, learn how to prevent multiple users from running the stored procedure at the same time.
2014-04-24
6,094 reads
Locking, Blocking and Deadlocking
Introduction into Locking, Blocking and Deadlocks in SQL Server, and why SQL Server uses these actions.
2013-11-18
10,674 reads
2013-08-02
1,940 reads
2013-06-20
2,400 reads
Use of Identity Property to Resolve Concurrency Issues
This article describes how the identity property was used to resolve contention in a database
2013-03-22 (first published: 2011-02-24)
18,370 reads
2010-02-18
3,594 reads
Parallel Processing
Satish More brings us a framework that you can use to execute a number of jobs in parallel and finish a task quickly.
2009-10-12
11,839 reads
2008-09-05 (first published: 2008-07-10)
2,679 reads
Optimistic Locking in SQL Server using the ROWVERSION Data Type
Using the default SQL Server READ COMMITTED isolation level, my application sometimes falls victim to the dreaded "lost update" condition where two of my users edit the same row for update but the user who submits his/her change last overwrites changes made by the other user. Is there a good way to check for this and prevent it?
2008-06-02
3,771 reads
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Question of the Day
The Funny SELECTs
What is returned from this query?
SELECT
( SELECT COUNT (*) FROM Sales.SalesOrderHeader AS soh
WHERE soh.OrderDate >= '01/01/2011' AND soh.OrderDate < '01/01/2012') AS OrdersIn2011
, ( SELECT COUNT (*) FROM Sales.SalesOrderHeader AS soh
WHERE soh.OrderDate >= '01/01/2012' AND soh.OrderDate < '01/01/2013') AS OrdersIn2012
, ( SELECT COUNT (*) FROM Sales.SalesOrderHeader AS soh
WHERE soh.OrderDate >= '01/01/2013' AND soh.OrderDate < '01/01/2014') AS OrdersIn2013; See possible answers