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47 lines
1.3 KiB
Markdown
47 lines
1.3 KiB
Markdown
---
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sidebar_position: 144
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---
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# sumCount {#agg_function-sumCount}
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Calculates the sum of the numbers and counts the number of rows at the same time. The function is used by ClickHouse query optimizer: if there are multiple `sum`, `count` or `avg` functions in a query, they can be replaced to single `sumCount` function to reuse the calculations. The function is rarely needed to use explicitly.
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**Syntax**
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``` sql
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sumCount(x)
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```
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**Arguments**
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- `x` — Input value, must be [Integer](../../../sql-reference/data-types/int-uint.md), [Float](../../../sql-reference/data-types/float.md), or [Decimal](../../../sql-reference/data-types/decimal.md).
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**Returned value**
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- Tuple `(sum, count)`, where `sum` is the sum of numbers and `count` is the number of rows with not-NULL values.
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Type: [Tuple](../../../sql-reference/data-types/tuple.md).
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**Example**
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Query:
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``` sql
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CREATE TABLE s_table (x Int8) Engine = Log;
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INSERT INTO s_table SELECT number FROM numbers(0, 20);
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INSERT INTO s_table VALUES (NULL);
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SELECT sumCount(x) from s_table;
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```
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Result:
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``` text
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┌─sumCount(x)─┐
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│ (190,20) │
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└─────────────┘
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```
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**See also**
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- [optimize_syntax_fuse_functions](../../../operations/settings/settings.md#optimize_syntax_fuse_functions) setting.
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