Input Table Schema
The table can have additional columns, but the function ignores them.
|partition_column||Any||Column by which input data is partitioned. This column must contain all rows that contain entity to average. For example, if function is to return exponential moving average of a particular stock share price, all transactions of that stock must be in one partition.|
|order_column||TIME, TIMESTAMP, INTEGER, SMALLINT, or BIGINT||Column by which input table is ordered.|
|target_column||INTEGER, SMALLINT, BIGINT, or DOUBLE PRECISION||[Column appears once for each specified target_column.] Values to average.|