ADC.sql

--Syntax (version 1.0)

--You call this function by combining a local row function followed by a partition function:

SELECT * FROM ApproxDCountReduce(
  ON(SELECT * FROM ApproxDCountMap(
      ON {table_name | view_name | (query)}
      COLUMNS ('column_name')
      [ERROR ('error_tolerance')]
      )
  )
  PARTITION BY expression [, ...] 
);