Microsoft SQL Server
Send email when log or data file grows
One way to keep track of your data- and log file sizes in SQL Server, is to send an email notification whenever a file growth occurs.
Microsoft SQL Server
Create XML with T-SQL function FOR XML
Some time ago I demonstrated how to use XQuery to map a hierarchical XML document into parent- child relational tables. You can find that article here. The other way around, (to create create XML with T-SQL), is a lot easier to do.
Microsoft SQL Server
sys.dm_exec_cached_plans
The dynamic management view sys.dm_exec_cached_plans returns information on query plans currently in memory. This information can be useful for a lot of reasons: checking total memory allowed for cached plans, which plans aren’t getting reused, searching for certain query plan operators (for instance, scans), which query plans are high memory consumers etc.
Microsoft SQL Server
How to fill in gaps in time series
In some cases it is necessary to have an unbroken time series, for instance to have all days during a year. But what if some days are missing from the data? How can we fill in gaps in time series?
Microsoft SQL Server
Calculating Earned Premium in SQL Server
In most business, when a company receives payment for a sold product, that payment can be considered an income. But to an insurance company, only the part of the premium that has been earned (Earned Premium) can be considered as income. The rest is the unearned premium, or the premium reserve. How the premium is earned vary between insurance products and industries. Here I’ll show a couple of methods and how they are calculated in SQL Server.
Microsoft SQL Server
Sending HTML tables in mail from SQL Server
Microsoft SQL Server
Capturing Blocked Queries
In a previous post, I presented a solution for monitoring and logging long running queries in SQL Server. In this post I’ll show an extended version of that solution that also sends an email when a request has been blocked for more than 20 seconds.
Microsoft SQL Server
Capturing Long Running Queries
Long running queries in a database may or may not be a problem, depending on the type of system. In a data warehouse solution, queries that runs for several minutes may be perfectly normal and nothing to worry about. But in an OLTP system, long running queries may cause performance problems. Read on to see how to monitor for long running queries in SQL Server.
Microsoft SQL Server
Capturing deadlock events
Traditionally, trace flags 1204 or 1222 are used to write information about deadlock events to the SQL Server log. But since SQL Server 2012, there is a default Extended Event session running called system_health that can be used instead. Extended events are stored as XML, and in this post I’ll show a method to extract information when a deadlock occurs and store it in a regular table. By having the deadlocks stored in a table, it is possible to view the history of deadlocks in order to enhance deadlock investigations.
Microsoft SQL Server