Note that the results show the current offset from UTC time zone (when the query was run), as well as a BIT column representing the current Daylight Saving Time (DST) state.
ALASKA TIME ZONE UPDATE
If there is a change to a time zone for any reason, Microsoft will update this list through a Windows Update or Cumulative Update, depending on the platform.Īs of this writing (5 September 2018), the following time zones are available. This is the recommended method if you do not have access to the registry hive. 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. 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). The timezone name is taken from a list maintained in the following Windows registry hive: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones Where Do We Find the List of Possible Time Zones? If the input value is not in one of the accepted formats, we can convert it using the CAST or CONVERT system functions. The result is output as a DATETIMEOFFSETdata type. The accepted input data types are SMALLDATETIME, DATETIME and DATETIME2. We can use this hint in a SELECT query, for example: SELECT inputdate AT TIME ZONE 'Name of destination time zone' For this use-case, we can use the AT TIME ZONE hint, which was introduced in SQL Server 2016. Sometimes though, it may be necessary to query data directly and see what the local date and time is, or calculate the date and time in another region. It is also advisable to store dates and times in UTC format on our on-premises SQL Server instances, and handle all time zone calculations at the presentation layer. In the Azure SQL Database, the regional settings of the database are set to UTC by default.
Continuing the series on dates and times in SQL Server and Azure SQL Database, this week we look at the hint AT TIME ZONE.
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