Convert imported data to dates with time zones

Now that we have seen the three type-safe conversion functions, we can begin to apply them against real data sets. In this scenario, we will parse data from the dbo.ImportedTime table. We used a different application to load data from this table and looked at it in a prior exercise. This time, we will retrieve data for all rows, not just the ones the importing application marked as valid.

This exercise is part of the course

Time Series Analysis in SQL Server

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Exercise instructions

Fill in the missing TRY_XXX() function name inside the EventDates common table expression.
Convert the EventDateOffset event dates to 'UTC'. Call this output EventDateUTC.
Convert the EventDateOffset event dates to 'US Eastern Standard Time' using AT TIME ZONE. Call this output EventDateUSEast.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

WITH EventDates AS
(
    SELECT
        -- Fill in the missing try-conversion function
        ___(DATETIME2(3), it.EventDate) AT TIME ZONE it.TimeZone AS EventDateOffset,
        it.TimeZone
    FROM dbo.ImportedTime it
        INNER JOIN sys.time_zone_info tzi
			ON it.TimeZone = tzi.name
)
SELECT
    -- Fill in the approppriate event date to convert
	CONVERT(NVARCHAR(50), ed.EventDateOffset) AS EventDateOffsetString,
	CONVERT(DATETIME2(0), ed.EventDateOffset) AS EventDateLocal,
	ed.TimeZone,
    -- Convert from a DATETIMEOFFSET to DATETIME at UTC
	CAST(ed.EventDateOffset AT TIME ZONE '___' AS DATETIME2(0)) AS EventDateUTC,
    -- Convert from a DATETIMEOFFSET to DATETIME with time zone
	CAST(ed.EventDateOffset ___ ___ ___ 'US Eastern Standard Time'  AS DATETIME2(0)) AS EventDateUSEast
FROM EventDates ed;

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