In a perfect world everyone has the right backups to be able to recover within the downtime and data-loss service level agreements when accidental data loss or corruption occurs. Unfortunately we don’t live in a perfect world and so many people find that they don’t have the backups they need to recover when faced with corruption.
2012-06-25
4,928 reads
Not only is the process of normalization valuable for increasing data quality and simplifying the process of modifying data, but it actually makes the database perform much faster. To prove the point, Peter Larsson takes a large unnormalised database and subjects it to successive stages of normalisation.
2012-06-25
4,835 reads
This article describes a utility that allows you to inspect cached plans and extract information that can be useful in improving the performance of your SQL.
2012-06-22 (first published: 2009-06-11)
47,552 reads
Planning on patching my SQL Servers to the latest service pack, but not sure how to complete this for a environment that is using database mirroring? In this tip, will outline the environment and then walk through the process of patching mirrored servers.
2012-06-22
3,569 reads
A callout text box outside the map area would help to enhance the visual effect of presenting data in reporting services.
2012-06-21
6,585 reads
Joe Celko delves into the main uses of views, explains how the WITH CHECK OPTION works, and demonstrates how the INSTEAD OF trigger can be used in those cases where views cannot be updatable.
2012-06-21
4,945 reads
To prepare a database for mirroring, you need to perform the following steps: Script the restore of the latest full database backup, script the restore of every transaction log backup that has been made after that full database backup, copy the full database backup and transaction log backups to the mirror server, and run the restore scripts on the mirror server.
In this tip I will walk through these steps and provide sample scripts to prepare a database for mirroring.
2012-06-20
3,662 reads
On Tuesday June 19th 12PM noon Central, Neil Hambly will discuss "Leveraging the power of constraints to improve both data quality and performance of your databases."
2012-06-19
3,690 reads
Why would you ever need to automatically monitor the SQL Servers in your care? What is the business value of doing so? What are the important features that a DBA should look for in a performance-monitoring tool? Rodney Landrum gives answers based on long experience.
2012-06-19
3,685 reads
Change tracking in SQL Server 2008 enables applications to obtain only changes that have been made to the user tables, along with the information about those changes.
2012-06-18
8,313 reads
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...
By Steve Jones
One of the things I’ve been requesting for a number of years is cost...
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