Expands a column having a PERIOD data type, creating a regular time series of rows based on the period value in the input row.
The expansion of a PERIOD column produces one value-equivalent row for each of the time granules in the epoch or timestamp representation of the specified time granule.
You can perform time series expansions only on PERIOD expressions which can be regular period expressions or derived period columns.
For more information about the EXPAND ON clause, see Teradata Vantage™ - Temporal Table Support, B035-1182.
ANSI Compliance
EXPAND ON is a Teradata extension to the ANSI SQL:2011 standard.
Because of this, the database reports a warning message if you use an EXPAND ON clause in a session in which the SQL Flagger is set. For information about the SQL Flagger, see Teradata Vantage™ - SQL Fundamentals, B035-1141.
The Teradata SQL EXPAND ON clause does not share any functionality with the EXPANDING clause of the ANSI SQL:2011 standard.