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9 lines
422 B
SQL
9 lines
422 B
SQL
set allow_suspicious_low_cardinality_types = true;
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drop table if exists low_null_float;
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CREATE TABLE low_null_float (a LowCardinality(Nullable(Float64))) ENGINE = MergeTree order by tuple();
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INSERT INTO low_null_float (a) SELECT if(number % 3 == 0, Null, number) FROM system.numbers LIMIT 1000000;
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SELECT a, count() FROM low_null_float GROUP BY a ORDER BY count() desc, a LIMIT 10;
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drop table if exists low_null_float;
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