Version 1.6
SELECT * FROM Sampling ( ON { table | view | (query) } PARTITION BY { ANY | key } USING StratumColumn ('stratum_column') Strata ('condition' [,...]) SampleFraction (fraction [,...]) [ Seed (seed) ] ) AS alias;
SELECT * FROM Sampling ( ON { table | view | (query) } PARTITION BY { ANY | key } USING StratumColumn ('stratum_column') Strata ('condition' [,...]) SampleFraction (fraction [,...]) [ Seed (seed) ] ) AS alias;