Input Table Schema
|partition_column||Any||[Column appears once for each specified partition_column.] Column by which input data is partitioned. This column must contain all rows of an entity. For example, if function is to compute moving average of a particular stock share price, all transactions of that stock must be in one partition.
PARTITION BY clause assumes column names are in Normalization Form C (NFC).
|order_column||Any||[Column appears once for each specified order_column.] Column by which input table is ordered.
ORDER BY clause supports only ASCII collation.
|target_column||INTEGER, SMALLINT, BIGINT, NUMERIC, NUMBER, or DOUBLE PRECISION||[Column appears once for each specified target_column.] Values to average.|