For years, I’ve advocated for keeping developer documentation in the same code repository as the code it describes. In the age of AI, that practice has become even more important. The reason is simple: the easier we make it to maintain documentation, the more likely … [Read More]
There’s a particular kind of writing that has become increasingly easy to produce: technically plausible, grammatically correct, reasonably well organized, and almost completely exhausting to read. You know the stuff–it has a lot of words. It has headings for everything. It explains things that don’t … [Read More]
SQL Agent’s schema is older than me. It handles dates, times, and durations like it’s 1980 by using integers instead of date/time data types. My buddy Aaron Bertrand talks more about Dating Responsibly so that you can have a good datetime with your own database. … [Read More]
For a while, I have been thinking about using my Stack Overflow answers (and answers on other sites on the Stack Exchange Network), and storing a copy of them here, on my blog as well. All posts on the Stack Exchange network are covered under … [Read More]
Statistics auto-updates are generally a good thing–auto-update of statistics is the default behavior in SQL Server. Having the freshest information about the data “shape” helps to inform the best selection of an execution plan for queries. Except for when it doesn’t. Because It Depends™️ Let’s … [Read More]
For this month’s T-SQL Tuesday, Brent Ozar (blog|Instagram) asks us to describe the most recent ticket we closed. “We had a pretty significant wait spike…” The literal last ticket I closed was “please run this script in production…”, and I don’t think it would be … [Read More]
Question I have the following SQL Server table : For the two constraints I listed the more important constraint first hoping that if both constraints are violated, the first one would be triggered and displayed to the user. However, it appears the constraints are declared … [Read More]
Question We have a 3TB OLTP database running Siemens Opcenter MES software at one of our manufacturing plants in China. This is setup in an Always-On Availability group with one secondary node. As this is a manufacturing plant, we are only provided 11 1/2 hours … [Read More]
Question I’m passing a JSON string to a stored procedure in order to insert warehouse inventory. Sometimes, there will be multiple line items with the same product, going to the same shelf, on the same pallet (LPN), with the same date. I would like to … [Read More]
Question In Javascript, Excel, Python, and a scientific calculator, the modulo operation gives a value of 113.84230371659942. (Or something very close to that, depending on number of decimal places and rounding.) But in T-SQL, returns a value of -246.1576962834. I’ve tried using As I was … [Read More]
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