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Update docs/ru/sql-reference/aggregate-functions/reference/sumcount.md

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Co-authored-by: olgarev <56617294+olgarev@users.noreply.github.com>
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docs/ru/sql-reference/aggregate-functions/reference/sumcount.md
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@ -27,8 +27,9 @@ sumCount(x)
Запрос:
``` sql
CREATE TABLE test (x Int8) Engine = Log;
CREATE TABLE test (x Nullable(Int8)) Engine = Log;
INSERT INTO test SELECT number FROM numbers(1, 20);
INSERT INTO test VALUES (NULL);
SELECT sumCount(x) from test;
```