Database, Postgresql, Stream Processing, Virtual Machine, Alibabacloud.
AS SELECT sum(x::int),count(*),avg(y::int) FROM stream1; CREATE CONTINUOUS VIEW v002 AS SELECT sum(x::int),count(*),avg(y::int) FROM stream2; CREATE CONTINUOUS VIEW v003 AS SELECT sum(x::int),count(*),avg(y::int) FROM stream3; Activate stream statistics. activate; View the data dictionary. select