diff --git a/docs/en/operations/settings/settings.md b/docs/en/operations/settings/settings.md
index 4c61830b94e..37609939071 100644
--- a/docs/en/operations/settings/settings.md
+++ b/docs/en/operations/settings/settings.md
@@ -3015,7 +3015,7 @@ Query:
 ``` sql
 CREATE TABLE fuse_tbl(a Int8, b Int8) Engine = Log;
 SET optimize_fuse_sum_count_avg = 1;
-EXPLAIN SYNTAX SELECT sum(a), sum(b), count(b) from fuse_tbl FORMAT TSV;
+EXPLAIN SYNTAX SELECT sum(a), sum(b), count(b), avg(b) from fuse_tbl FORMAT TSV;
 ```
 
 Result:
@@ -3024,7 +3024,8 @@ Result:
 SELECT
     sum(a),
     sumCount(b).1,
-    sumCount(b).2
+    sumCount(b).2,
+    (sumCount(b).1) / (sumCount(b).2)    
 FROM fuse_tbl
 ```
 
diff --git a/docs/en/sql-reference/aggregate-functions/reference/sumcount.md b/docs/en/sql-reference/aggregate-functions/reference/sumcount.md
index 9dd68e7e104..086d8619c5a 100644
--- a/docs/en/sql-reference/aggregate-functions/reference/sumcount.md
+++ b/docs/en/sql-reference/aggregate-functions/reference/sumcount.md
@@ -14,7 +14,7 @@ sumCount(x)
 
 **Returned value**
 
--   Tuple `(sum, count)`, where `sum` is the sum of numbers and `count` is a counts the number of rows or not-NULL values.
+-   Tuple `(sum, count)`, where `sum` is the sum of numbers and `count` is the number of rows with not-NULL values.
 
 Type: [Tuple](../../../sql-reference/data-types/tuple.md).
 
@@ -38,4 +38,4 @@ Result:
 
 **See also**
 
-- [optimize_fuse_sum_count_avg](../../../operations/settings/settings.md#optimize_fuse_sum_count_avg) setting.
\ No newline at end of file
+- [optimize_fuse_sum_count_avg](../../../operations/settings/settings.md#optimize_fuse_sum_count_avg) setting.
diff --git a/docs/ru/operations/settings/settings.md b/docs/ru/operations/settings/settings.md
index 3a67642cc51..620e38b2f94 100644
--- a/docs/ru/operations/settings/settings.md
+++ b/docs/ru/operations/settings/settings.md
@@ -2906,7 +2906,7 @@ SELECT * FROM test LIMIT 10 OFFSET 100;
 ``` sql
 CREATE TABLE fuse_tbl(a Int8, b Int8) Engine = Log;
 SET optimize_fuse_sum_count_avg = 1;
-EXPLAIN SYNTAX SELECT sum(a), sum(b), count(b) from fuse_tbl FORMAT TSV;
+EXPLAIN SYNTAX SELECT sum(a), sum(b), count(b), avg(b) from fuse_tbl FORMAT TSV;
 ```
 
 Результат:
@@ -2915,7 +2915,8 @@ EXPLAIN SYNTAX SELECT sum(a), sum(b), count(b) from fuse_tbl FORMAT TSV;
 SELECT
     sum(a),
     sumCount(b).1,
-    sumCount(b).2
+    sumCount(b).2,
+    (sumCount(b).1) / (sumCount(b).2)
 FROM fuse_tbl
 ```
 
diff --git a/docs/ru/sql-reference/aggregate-functions/reference/sumcount.md b/docs/ru/sql-reference/aggregate-functions/reference/sumcount.md
index d6b9c98f724..b6caf2a94b8 100644
--- a/docs/ru/sql-reference/aggregate-functions/reference/sumcount.md
+++ b/docs/ru/sql-reference/aggregate-functions/reference/sumcount.md
@@ -18,7 +18,7 @@ sumCount(x)
 
 **Возвращаемое значение**
 
--   Кортеж из элементов `(sum, count)`, где `sum` — это сумма чисел и `count` — количество строк или не-нулевых значений.
+-   Кортеж из элементов `(sum, count)`, где `sum` — это сумма чисел и `count` — количество строк со значениями, отличными от `NULL`.
 
 Тип: [Tuple](../../../sql-reference/data-types/tuple.md).
 
@@ -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;
 ```
 
@@ -42,4 +43,4 @@ SELECT sumCount(x) from test;
 
 **Смотрите также**
 
-- Настройка [optimize_fuse_sum_count_avg](../../../operations/settings/settings.md#optimize_fuse_sum_count_avg)
\ No newline at end of file
+- Настройка [optimize_fuse_sum_count_avg](../../../operations/settings/settings.md#optimize_fuse_sum_count_avg)