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6 lines
282 B
SQL
6 lines
282 B
SQL
DROP TABLE IF EXISTS nulls;
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CREATE TABLE nulls (d Date, x Nullable(UInt64)) ENGINE = MergeTree(d, d, 8192);
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INSERT INTO nulls SELECT toDate('2000-01-01'), number % 10 != 0 ? number : NULL FROM system.numbers LIMIT 10000;
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SELECT count() FROM nulls WHERE x IS NULL;
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DROP TABLE nulls;
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