mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-24 08:32:02 +00:00
109 lines
5.4 KiB
Markdown
109 lines
5.4 KiB
Markdown
---
|
|
slug: /en/sql-reference/aggregate-functions/reference/intervalLengthSum
|
|
sidebar_position: 146
|
|
sidebar_label: intervalLengthSum
|
|
title: intervalLengthSum
|
|
---
|
|
|
|
Calculates the total length of union of all ranges (segments on numeric axis).
|
|
|
|
**Syntax**
|
|
|
|
``` sql
|
|
intervalLengthSum(start, end)
|
|
```
|
|
|
|
**Arguments**
|
|
|
|
- `start` — The starting value of the interval. [Int32](../../../sql-reference/data-types/int-uint.md#uint8-uint16-uint32-uint64-int8-int16-int32-int64), [Int64](../../../sql-reference/data-types/int-uint.md#uint8-uint16-uint32-uint64-int8-int16-int32-int64), [UInt32](../../../sql-reference/data-types/int-uint.md#uint8-uint16-uint32-uint64-int8-int16-int32-int64), [UInt64](../../../sql-reference/data-types/int-uint.md#uint8-uint16-uint32-uint64-int8-int16-int32-int64), [Float32](../../../sql-reference/data-types/float.md#float32-float64), [Float64](../../../sql-reference/data-types/float.md#float32-float64), [DateTime](../../../sql-reference/data-types/datetime.md#data_type-datetime) or [Date](../../../sql-reference/data-types/date.md#data_type-date).
|
|
- `end` — The ending value of the interval. [Int32](../../../sql-reference/data-types/int-uint.md#uint8-uint16-uint32-uint64-int8-int16-int32-int64), [Int64](../../../sql-reference/data-types/int-uint.md#uint8-uint16-uint32-uint64-int8-int16-int32-int64), [UInt32](../../../sql-reference/data-types/int-uint.md#uint8-uint16-uint32-uint64-int8-int16-int32-int64), [UInt64](../../../sql-reference/data-types/int-uint.md#uint8-uint16-uint32-uint64-int8-int16-int32-int64), [Float32](../../../sql-reference/data-types/float.md#float32-float64), [Float64](../../../sql-reference/data-types/float.md#float32-float64), [DateTime](../../../sql-reference/data-types/datetime.md#data_type-datetime) or [Date](../../../sql-reference/data-types/date.md#data_type-date).
|
|
|
|
:::note
|
|
Arguments must be of the same data type. Otherwise, an exception will be thrown.
|
|
:::
|
|
|
|
**Returned value**
|
|
|
|
- Total length of union of all ranges (segments on numeric axis). Depending on the type of the argument, the return value may be [UInt64](../../../sql-reference/data-types/int-uint.md#uint8-uint16-uint32-uint64-int8-int16-int32-int64) or [Float64](../../../sql-reference/data-types/float.md#float32-float64) type.
|
|
|
|
**Examples**
|
|
|
|
1. Input table:
|
|
|
|
``` text
|
|
┌─id─┬─start─┬─end─┐
|
|
│ a │ 1.1 │ 2.9 │
|
|
│ a │ 2.5 │ 3.2 │
|
|
│ a │ 4 │ 5 │
|
|
└────┴───────┴─────┘
|
|
```
|
|
|
|
In this example, the arguments of the Float32 type are used. The function returns a value of the Float64 type.
|
|
|
|
Result is the sum of lengths of intervals `[1.1, 3.2]` (union of `[1.1, 2.9]` and `[2.5, 3.2]`) and `[4, 5]`
|
|
|
|
Query:
|
|
|
|
``` sql
|
|
SELECT id, intervalLengthSum(start, end), toTypeName(intervalLengthSum(start, end)) FROM fl_interval GROUP BY id ORDER BY id;
|
|
```
|
|
|
|
Result:
|
|
|
|
``` text
|
|
┌─id─┬─intervalLengthSum(start, end)─┬─toTypeName(intervalLengthSum(start, end))─┐
|
|
│ a │ 3.1 │ Float64 │
|
|
└────┴───────────────────────────────┴───────────────────────────────────────────┘
|
|
```
|
|
|
|
2. Input table:
|
|
|
|
``` text
|
|
┌─id─┬───────────────start─┬─────────────────end─┐
|
|
│ a │ 2020-01-01 01:12:30 │ 2020-01-01 02:10:10 │
|
|
│ a │ 2020-01-01 02:05:30 │ 2020-01-01 02:50:31 │
|
|
│ a │ 2020-01-01 03:11:22 │ 2020-01-01 03:23:31 │
|
|
└────┴─────────────────────┴─────────────────────┘
|
|
```
|
|
|
|
In this example, the arguments of the DateTime type are used. The function returns a value in seconds.
|
|
|
|
Query:
|
|
|
|
``` sql
|
|
SELECT id, intervalLengthSum(start, end), toTypeName(intervalLengthSum(start, end)) FROM dt_interval GROUP BY id ORDER BY id;
|
|
```
|
|
|
|
Result:
|
|
|
|
``` text
|
|
┌─id─┬─intervalLengthSum(start, end)─┬─toTypeName(intervalLengthSum(start, end))─┐
|
|
│ a │ 6610 │ UInt64 │
|
|
└────┴───────────────────────────────┴───────────────────────────────────────────┘
|
|
```
|
|
|
|
3. Input table:
|
|
|
|
``` text
|
|
┌─id─┬──────start─┬────────end─┐
|
|
│ a │ 2020-01-01 │ 2020-01-04 │
|
|
│ a │ 2020-01-12 │ 2020-01-18 │
|
|
└────┴────────────┴────────────┘
|
|
```
|
|
|
|
In this example, the arguments of the Date type are used. The function returns a value in days.
|
|
|
|
Query:
|
|
|
|
``` sql
|
|
SELECT id, intervalLengthSum(start, end), toTypeName(intervalLengthSum(start, end)) FROM date_interval GROUP BY id ORDER BY id;
|
|
```
|
|
|
|
Result:
|
|
|
|
``` text
|
|
┌─id─┬─intervalLengthSum(start, end)─┬─toTypeName(intervalLengthSum(start, end))─┐
|
|
│ a │ 9 │ UInt64 │
|
|
└────┴───────────────────────────────┴───────────────────────────────────────────┘
|
|
```
|