ClickHouse/dbms/tests/queries/1_stateful/00078_group_by_arrays.sql

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SELECT GoalsReached AS k, count() AS c FROM test.hits GROUP BY k ORDER BY c DESC LIMIT 10;
SELECT GeneralInterests AS k1, GoalsReached AS k2, count() AS c FROM test.hits GROUP BY k1, k2 ORDER BY c DESC LIMIT 10;
SELECT ParsedParams.Key1 AS k1, GeneralInterests AS k2, count() AS c FROM test.hits GROUP BY k1, k2 ORDER BY c DESC LIMIT 10;
SELECT ParsedParams.Key1 AS k1, GeneralInterests AS k2, count() AS c FROM test.hits WHERE notEmpty(k1) AND notEmpty(k2) GROUP BY k1, k2 ORDER BY c DESC LIMIT 10;