Temporal Table Time Zones

Louis Davidson talks about how to translate temporal table start and end dates to your local time zone:

In my first 5 blogs on Temporal, I failed to note something pretty important about their usage. The start and end times for the row (and it follows, the historical rows) are likely not in your local time zone. They are stored in UTC time zone. This is obviously good because of that pesky daylight saving time issue where 1:30 AM occurs twice each year (here in the US, the time occurs on the first Sunday of November).

Unless you live in London, England or someplace where the offset from UTC is 0, it can make working with these tables confusing, because most people rarely work in UTC time, and even rarer is to think in UTC time when most of your data is likely in your local time zone. So you write your query and use local time…and then, most likely, data is returned…but not necessarily the data you actually desired.

Click through to see ways of translating those values.

Related Posts

Using DATEADD In SQL Server

Randolph West continues a series on date and time types in SQL Server with the DATEADD function: As with similar functions, DATEADD can do arithmetic on dates as well as times. The syntax is straightforward: DATEADD (datepart, number, date) The number portion must be an integer, and it must be within the acceptable range of values for the date part. […]

Read More

Working With Dates And Times In T-SQL

Tomaz Kastrun walks us through various functions to work with dates and times in T-SQL: Manipulating date and time in T-SQL is a daily and very common task that every DBA, SQL Developer, BI Developer and data scientist will come across. And over the years, I have accumulated many of the simple date or/and time […]

Read More

Categories

September 2017
MTWTFSS
« Aug Oct »
 123
45678910
11121314151617
18192021222324
252627282930