There still seems to be a lot of fear, uncertainty and doubt, in the community, with regard to use of Hyper-threading (HT) with SQL Server workloads. So, how and when should it be used?
2011-01-24
824 reads
Given that disk storage has come down substantially in price over recent years, will RAID 5 continue to be relevant as a storage configuration for databases?
2011-01-10
820 reads
If SSDs are about to make obsolete one of the major driving forces behind the development of SANs (disk latency) then how is the storage array going to change in the near future?
2010-12-06
524 reads
You believe that an index is unused and so could be removed, and yet, your finger hovers nervously over the metaphorical "delete" button. You can't quite bring yourself to do it. Is it really safe to drop this index? Tony wonders if "invisible indexes" might solve this dilemma.
2010-11-01
396 reads
Many of the SQL Server DMVs still have a wild, unfinished feel but they are an incredibly useful tool for DBA, well-worth the sweat and toil required to learn and query them effectively.
2010-08-23
452 reads
There is much sound advice suggesting that every table should have a clustered index, and that narrow, integer, ever-increasing columns, such as afforded by an IDENTITY column are the best choice. But is the sedimentary approach really the natural order of the day?
2010-05-24
470 reads
Sometimes it's important for a developer or DBA to be given the opportunity to 'shake up their brain'. What falls out is almost always worth having.
2010-04-05
298 reads
All defensive programmers should, in general, avoid unsupported techniques. However, there is a balance to be struck between adherence to 'best practice' approaches to SQL programming, and the need to get the job done. Perhaps certain critical code would benefit from use of the age-old practice of double entry bookkeeping?
2010-03-22
992 reads
Tony Davis believes that it's time for a little more openness and democracy in the MVP award. In short, it's time to introduce community voting.
2010-02-08
144 reads
Earlier this week, Jeff Atwood suffered the sort of misfortune we all dread: hard drive failure and no backups. Tony Davis discusses what can be learned from this in terms of the chain of responsibility for an organization's data.
2009-12-21
150 reads
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...
??/WA:0817866887 Wisma Asia, Jl. Letjen S. Parman No.Kav. 79, RT.4/RW.9, Kota Bambu Sel., Kec....
WA:0817866887 Wisma BCA Pd. Indah, Jl. Metro Pondok Indah No.10, RT.3/RW.17, Pd. Pinang, Kec....
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