ClickHouse/dbms/tests/queries/1_stateful/00040_aggregating_materialized_view.sql

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DROP TABLE IF EXISTS test.basic;
CREATE MATERIALIZED VIEW test.basic
ENGINE = AggregatingMergeTree(StartDate, (CounterID, StartDate), 8192)
POPULATE AS
SELECT
CounterID,
StartDate,
sumState(Sign) AS Visits,
uniqState(UserID) AS Users
FROM test.visits
GROUP BY CounterID, StartDate;
SELECT
StartDate,
sumMerge(Visits) AS Visits,
uniqMerge(Users) AS Users
FROM test.basic
GROUP BY StartDate
ORDER BY StartDate;
SELECT
StartDate,
sumMerge(Visits) AS Visits,
uniqMerge(Users) AS Users
FROM test.basic
WHERE CounterID = 942285
GROUP BY StartDate
ORDER BY StartDate;
SELECT
StartDate,
sum(Sign) AS Visits,
uniq(UserID) AS Users
FROM test.visits
WHERE CounterID = 942285
GROUP BY StartDate
ORDER BY StartDate;
DROP TABLE test.basic;