Interval - ClickHouse Documentation

The family of data types representing time and date intervals. The resulting types of the INTERVAL operator. Structure:

Time interval as an unsigned integer value.
Type of an interval.

Supported interval types:

NANOSECOND
MICROSECOND
MILLISECOND
SECOND
MINUTE
HOUR
DAY
WEEK
MONTH
QUARTER
YEAR

For each interval type, there is a separate data type. For example, the DAY interval corresponds to the IntervalDay data type:

SELECT toTypeName(INTERVAL 4 DAY)

┌─toTypeName(toIntervalDay(4))─┐
│ IntervalDay                  │
└──────────────────────────────┘

Usage Remarks

You can use Interval-type values in arithmetical operations with Date and DateTime-type values. For example, you can add 4 days to the current time:

SELECT now() AS current_date_time, current_date_time + INTERVAL 4 DAY

┌───current_date_time─┬─plus(now(), toIntervalDay(4))─┐
│ 2019-10-23 10:58:45 │           2019-10-27 10:58:45 │
└─────────────────────┴───────────────────────────────┘

Also it is possible to use multiple intervals simultaneously:

SELECT now() AS current_date_time, current_date_time + (INTERVAL 4 DAY + INTERVAL 3 HOUR)

┌───current_date_time─┬─plus(current_date_time, plus(toIntervalDay(4), toIntervalHour(3)))─┐
│ 2024-08-08 18:31:39 │                                                2024-08-12 21:31:39 │
└─────────────────────┴────────────────────────────────────────────────────────────────────┘

And to compare values with different intervals:

SELECT toIntervalMicrosecond(179999999) < toIntervalMinute(3);

┌─less(toIntervalMicrosecond(179999999), toIntervalMinute(3))─┐
│                                                           1 │
└─────────────────────────────────────────────────────────────┘

SELECT toIntervalMicrosecond(3600000000) = toIntervalHour(1);

┌─equals(toIntervalMicrosecond(3600000000), toIntervalHour(1))─┐
│                                                            1 │
└──────────────────────────────────────────────────────────────┘

Mixed-type Intervals

Intervals of mixed type, e.g. multiple hours and multiple minutes, can be created using INTERVAL 'value' <from_kind> TO <to_kind> syntax. The result is a tuple of two or more intervals. Supported combinations:

Syntax	String format	Example
`YEAR TO MONTH`	`Y-M`	`INTERVAL '2-6' YEAR TO MONTH`
`DAY TO HOUR`	`D H`	`INTERVAL '5 12' DAY TO HOUR`
`DAY TO MINUTE`	`D H:M`	`INTERVAL '5 12:30' DAY TO MINUTE`
`DAY TO SECOND`	`D H:M:S`	`INTERVAL '5 12:30:45' DAY TO SECOND`
`HOUR TO MINUTE`	`H:M`	`INTERVAL '1:30' HOUR TO MINUTE`
`HOUR TO SECOND`	`H:M:S`	`INTERVAL '1:30:45' HOUR TO SECOND`
`MINUTE TO SECOND`	`M:S`	`INTERVAL '5:30' MINUTE TO SECOND`

Non-leading fields are validated per the SQL standard: MONTH 0-11, HOUR 0-23, MINUTE 0-59, SECOND 0-59.

SELECT INTERVAL '1:30' HOUR TO MINUTE;

┌─(toIntervalHour(1), toIntervalMinute(30))─┐
│ (1,30)                                     │
└────────────────────────────────────────────┘

An optional leading + or - sign applies to all components:

SELECT INTERVAL '+1:30' HOUR TO MINUTE;
-- this is equivalent to:
-- SELECT INTERVAL '1:30' HOUR TO MINUTE;

┌─(toIntervalHour(1), toIntervalMinute(30))─┐
│ (1,30)                                     │
└────────────────────────────────────────────┘

​Usage Remarks

​Mixed-type Intervals

​See Also

Usage Remarks

Mixed-type Intervals

See Also