A Fine Slice Of SQL Server
Sebastian Sauer shows off several ways of loading data into R:
Importing data into R can cause headaches for newbies. For some, the concept of relative and absolute paths is new. That’s why I compiled here some recommendations on how to important data into R and on how to ditch the “what’s my path” problem.
Click through for some notes. This post focused on files rather than databases, though that’s a very common way of loading data as well.
Comments closedAndrea Allred hits identity integer absolute zero:
Recently we had a system go down because we ran out of integers. (Mental note to create an alert when we are getting near to running out of integers.) If we upped the column to a bigint we were going to have to drop all the indexes. This server doesn’t have the capacity needed to do an operation of that size and it was estimated that it would be down for 8 hours while we dropped indexes, upped the column type and added back the indexes. This was way too long as it was early in the work day (had it been evening, it would have been fine).
There was also a concern about how many stored procedures were expecting an int but would need to be modified to a bigint, along with any code. That was a big undertaking and we were in an emergency down.
This reseeding typically works well, though it’s important to know if the code will fail upon getting negative numbers.
Comments closedQ: WhatsUpDocs?: Hi Brent, have you ever needed to look at business documentation (check business rules/logic) when consulting or as an employee, but it was severely lacking? Recently joined a different team in work and trying to find simple answers to questions is an uphill struggle…
The vast, vast majority of companies don’t document their technology. The tech is in a constant state of flux, and it’s a miracle if the tech even works, let alone is documented accurately. If you’re the kind of person who needs accurate, up-to-date documentation on the tools you use, you’ll be happier working for very large, slow-moving companies with compliance needs. Think giant global financial corporations.
Click through for the full list.
Comments closedErik Darling shows a rare case in which a view can improve performance:
They may have read, of course, that SQL Server’s super-smart variable length data types only consume necessary space.
It’s free real estate.
Except it isn’t, especially not when it comes to query memory grants.
I’m so used to views messing up performance rather than improving them.
Comments closedGilbert Quevauvilliers builds a report with daily alerts:
I was actually working on my own version of the Known Issues Power BI report, when the Power BI team released their blog post New Power BI Known Issue page | Microsoft Power BI Blog | Microsoft Power BI
In the steps below I am going to show you the report I created, and then how I configured it to alert me when there are updates to new known issues.
I also subscribed to this report on a daily basis, this allows me to quickly and easily be aware of any known issues in Power BI.
Read on to see how Gilbert did this and click through for a copy of the report for your own purposes.
Comments closedDave Bermingham runs some tests:
What makes this interesting is that you can now build shared storage based failover cluster instances that span Availability Zones (AZ). With cluster nodes residing in different AZs, users can now qualify for the 99.99% availability SLA. Prior to support for ZRS, Azure Shared Disks only supported Locally Redundant Storage (LRS), limiting cluster deployments to a single AZ, leaving users susceptible to outages should an AZ go offline.
There are however a few limitations to be aware of when deploying an Azure Shared Disk with ZRS.
Dave also checks to see how their performance compares to locally-redundant storage.
Comments closed