Almost every DBA will be asked to change data in production at some point. Too often we don't have the tools to allow users to correct errors, but when you make changes, Steve Jones reminds you that you need to be careful and still have a process.
As a DBA, you'll encounter elusive performance, connectivity and locking problems that you'll need to troubleshoot. There are many tools that you can use such as Profiler. In addition to these tools, SQL Server 2008 offers extended events ("XEvents"), which you can use as a powerful tracing system. By default, the "system_health" extended events session is always on, and can provide you help to locate the source of trouble much faster.
Can one generalize from agile techniques of application testing to database testing. Phil isn't entirely convinced that it can do any more that remove the distracting trivial bugs in order to allow testers to concentrate on the important issues
SQL 2008 has some key improvements over SQL 2005. This article deals with backup compression and faster backups in SQL 2008
Your job is to scan the trades data and identify combination of trades that match a given rollup data.
An open call to the amatuers that might want to pen some database related cartoons for Simple Talk Publishing.
Should we really avoid cursors? See how to rewrite code to avoid cursors and also analyze the implications.
Today Steve Jones asks how you handle those passwords across time for backups in this week's Friday poll.
By Steve Jones
I type fairly well. Well, I type fast, but I do wear out a...
By ReviewMyDB
Index maintenance has always meant nightly jobs and a window you have to defend....
I’m sure you’ve all heard the tale of Goldilocks and the Three Bears, but...
Comments posted to this topic are about the item SQL Art, Part 4: Happy...
Comments posted to this topic are about the item How We Handled a Vendor...
Comments posted to this topic are about the item Cognitive Coverage
I have this data in the dbo.Commission table in a SQL Server 2022 database.
salesperson commission Brian 12 Brian 16 Andy 7 Andy 14 Andy 21 Steve 20 Steve NULLAll the data is a varchar, and I decide to run this query to get the totals for each salesperson.
SELECT SalesPerson
, AVG(TRY_PARSE(Commission AS int)) AS TotalCommission
FROM commission
GROUP BY SalesPerson
GO
What average commission is calculated for Steve? See possible answers