Using AT TIME ZONE In SQL Server

Randolph West looks at the AT TIME ZONE clause when working with a specific time zone in SQL Server:

The time zone name is taken from a list maintained in the following Windows registry hive: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones

Note: For SQL Server on Linux (and Docker containers), a registry shim performs the same function as the Windows registry by intercepting the API calls and returning the expected value(s).

We can also use a Transact-SQL (T-SQL) query against the system view sys.time_zone_info, which uses the information from the registry hive. This is the recommended method if you do not have access to the registry hive.

Click through for a couple of examples.

Related Posts

Pivoting Performance Counter Data

Dave Bland shows how you can build a dynamic pivot to see performance counter data over a stretch of time: The next step is to write the code to capture the counter values and insert the data it the temporary table created above.  Because we need to capture the values over a period of time, […]

Read More

Calculating Weighted Averages in SQL

Lukas Eder shows how you can calculate weighted averages using SQL: As can be seen, this schema is slightly denormalised as the number of lines per transaction are precalculated in the transactions.lines column. This will turn out to be quite useful for this calculation, but it isn’t strictly necessary. Now, in the previously linked Stack Overflow question, […]

Read More


September 2018
« Aug Oct »