DATENAME Function - Sybase ASE to PostgreSQL Migration

In SAP Sybase Adaptive Server Enterprise (ASE) you can use DATENAME function to extract the specified unit (a date part such as year, month, day etc.) from a datetime value. In PostgreSQL you can use TO_CHAR function with the specific format type.

Sybase ASE:

  -- Get the name of week day
  SELECT DATENAME(dw, '2022-12-29')
  # Thursday

PostgreSQL:

  -- Get the name of week day
  SELECT TO_CHAR(DATE '2022-12-29', 'Day');
  # Thursday

You can map Sybase ASE DATENAME units to the appropriate TO_CHAR format in PostgreSQL as follows:

For more information, see Sybase ASE to PostgreSQL Migration.