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Non use of persisted data – Part Three
A long time ago I looked at some reasons as to why persisted computed columns ( and therefore indexes on those columns) are not used (Part1, Part2). Recently I was drawn into an issue where the same...
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SQLBits, Incremental Statistics and Demo Fail
So another great SQLBits is done and dusted, many thanks to the team, helpers and sponsors for putting on such a great event. It’s always a pleasure and honour to be able to present here and to get to...
View ArticleIncreasing ColumnStore compression ratio for archival and “Cold storage”
At my present client, part of the task I have to under take is to re-engineer the “Cold Storage”. This is ~20Terabytes of compressed CSVs going back over 15 years or so. Presently these are held on...
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SQL Saturday 496 Exeter – PreCon Agenda
Hi Unfortunately due to matters outside of my control, SQL Saturday 502 in Edinburgh has been cancelled, I would like to thank the team though for selecting my pre-con. Let me know if you would have...
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My favourite wait state– ASYNC_NETWORK_IO
Sometimes it does feel that a problem is a database problem until proven otherwise. When this does occur I have had to put a lot of time and effort into demonstrating the hows and whys. One of the...
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A first look at SQL Server 2016–String_split
I’ve been developing T-SQL for about 20 years now and almost since day one there has been functionality that , IMO, has been missing. That is grouped string concatenation (ie forming a delimited...
View ArticleA journey to a movie recommender in U-SQL
I haven’t gotten to involved in the whole “Big Data” movement to much, I’ve kept an arms length watch and played around with a few of those technologies but never really jumped in and got down and...
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.Net 4.6.1 and MultiSubnetFailover
Im not a big clustering/HA expert, but I obviously understand the need for such things to exist However, the standard SQL tooling, SSMS etc, seems to go out of its way to make the MultiSubNetFailover...
View ArticleWhy is creating excel sheets from SSIS so hard ?
If there is one process that should be simpler than it is out of the box, it is creating Excel spreadsheets from SSIS. Over the years i’ve tried doing it a number of ways, using the built in...
View ArticleWho did what to my database and when…
One of the most popular questions on forums / SO etc is, “How can i find out who dropped a table, truncated a table, dropped a procedure….” etc. Im sure we have all been there, something changes (...
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