AT TIME ZONE

Applies to

• SQL Server

• Azure Synapse Analytics

Description

Converts an inputdate to the corresponding datetimeoffset value in the target time zone. (AT TIME ZONE in Transact-SQL).

Sample Source Pattern

Syntax

SQL Server

inputdate AT TIME ZONE timezone

Snowflake SQL

Snowflake SQL Documentation

CONVERT_TIMEZONE( <source_tz> , <target_tz> , <source_timestamp_ntz> )

CONVERT_TIMEZONE( <target_tz> , <source_timestamp> )

Examples

SQL Server

IN -> SqlServer_01.sql

SELECT CAST('2022-11-24 11:00:45.2000000 +00:00' as datetimeoffset) at time zone 'Alaskan Standard Time';

Result:

                          DATE|
------------------------------+
2022-11-24 02:00:45.200 -09:00|

Snowflake SQL

OUT -> SqlServer_01.sql

SELECT
CONVERT_TIMEZONE('America/Anchorage', CAST('2022-11-24 11:00:45.2000000 +00:00' as TIMESTAMP_TZ(7)));

Result:

                          DATE|
------------------------------+
2022-11-24 02:00:45.200 -09:00|

SQL Server

Code:

IN -> SqlServer_02.sql

SELECT current_timestamp at time zone 'Central America Standard Time';

Result:

                          DATE|
------------------------------+
2022-10-10 10:55:50.090 -06:00|

Snowflake SQL

Code:

OUT -> SqlServer_02.sql

SELECT
CONVERT_TIMEZONE('America/Costa_Rica', CURRENT_TIMESTAMP() /*** SSC-FDM-TS0024 - CURRENT_TIMESTAMP in At Time Zone statement may have a different behavior in certain cases ***/);

Result:

                          DATE|
------------------------------+
2022-10-10 10:55:50.090 -06:00|

Known Issues

1. Snowflake does not support all the time zones that SQL Server does. You can check the supported time zones at this link.

SQL Server

IN -> SqlServer_03.sql

SELECT current_timestamp at time zone 'Turks And Caicos Standard Time';

Result:

                          DATE|
------------------------------+
2022-12-14 20:04:18.317 -05:00| 

Snowflake SQL

OUT -> SqlServer_03.sql

SELECT
!!!RESOLVE EWI!!! /*** SSC-EWI-TS0063 - TIME ZONE NOT SUPPORTED IN SNOWFLAKE ***/!!!
CURRENT_TIMESTAMP() at time zone 'Turks And Caicos Standard Time';

Related EWIs

1. SSC-FDM-TS0024: CURRENT_TIMESTAMP in At Time Zone statement may have a different behavior in certain cases.
2. SSC-EWI-TS0063: Time zone not supported in Snowflake.