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’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]
I recently saw a question on DBA Stack Exchange (it has since been deleted by the author), who had a “special process” that ran regularly, and as part of that process, they disabled the trigger, did some stuff, and re-enabled it. During that process, the … [Read More]
I’m not going to beat around the bush. I hate the SERVERPROPERTY() and DATABASEPROPERTYEX() system functions. Loathing The thing I hate the most about these two functions is that you need to know the right magic spells to make them work. Let’s look at SERVERPROPERTY() … [Read More]
There was a recent post on Database Administrators, where there was some confusion over Daylight Saving Time(DST) in Australian timezones. Let’s be honest though–timezones are confusing, especially when DST comes into play. Arizona Time doesn’t observe Daylight Saving Time, so sometimes it’s the same as … [Read More]
Since I started at Stack Overflow, I’ve had the chance to see some of the interesting challenges with running our databases at our scale. My coworker Taryn Pratt (blog|twitter) recently blogged about fighting with deadlocks related to Stack Overflow for Teams. Lots of logins Taryn … [Read More]
SQL Server 2005 introduced Dynamic Management Views(DMVs). Technically, there are both views & functions–DMVs & DMFs, but colloquially they’re often simply referred to as just “DMVs”. DMVs simply return information about the state of the server or database and can be used for monitoring and … [Read More]
We’ve all been there. You’ve got a query where the JOIN or WHERE predicate is not SARGable. You’ve read about how this can be a problem, and how bad it is for performance. Alas, you cannot change the query. Sometimes this reason is political, sometimes … [Read More]
I recently came across a server where tempdb was breaking all the rules. Data files were all different sizes. I want all data files to be the same size so that proportional fill uses them evenly. There were 10 tempdb files, with 8 files on … [Read More]
This morning, my friend Aaron Bertrand (blog|twitter) posted a plea for help with STRING_SPLIT() improvements. I’m very much in Aaron’s corner on this, having written about the olden days myself. Why STRING_SPLIT() is supposed to be awesome CLR was fast, but inaccessible to many DBAs. … [Read More]
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