Identifies a field as an INTERVAL value defining a period of time in hours, minutes, and seconds.
Syntax
INTERVAL HOUR [ ( precision ) ] TO SECOND [ ( fractional_seconds_precision ) ] [ attributes [...] ]
- precision
- The permitted range of digits for HOUR, ranging from one to four.
- fractional_seconds_precision
- The fractional precision for the values of SECOND, ranging from zero to six.
- attributes
- Appropriate data type, column storage, or column constraint attributes.
ANSI Compliance
INTERVAL HOUR TO SECOND is ANSI SQL:2011 compliant.
Internal Representation of INTERVAL HOUR TO SECOND
Conceptually, INTERVAL HOUR TO SECOND has the following fields.
| Field Name | Storage Format | Total Length |
|---|---|---|
| HOUR | SMALLINT | 8 bytes |
| MINUTE | SMALLINT | |
| SECOND | INTEGER |
External Representation of INTERVAL HOUR TO SECOND
INTERVAL HOUR TO SECOND types are imported and exported in record and indicator modes as CHARACTER data using the client character set.
| WHEN fractional_seconds_precision is … | THEN the type and format are … |
|---|---|
| 0 | Type: CHARACTER(precision + 7) |
| Format: '-h(precision):mm:ss' | |
|
n
where n is 1 - 6 |
Type: CHARACTER(precision + n + 8) |
| Format: '-h(precision):mm:ss.s(n)' |
For example, for INTERVAL HOUR(2) TO SECOND(2), the value might be something like '-13:27:58.17'.
Range of Values
The range of values for INTERVAL HOUR TO SECOND is as follows.
| Type, Precision, and Fractional Seconds Precision | Minimum Value | Maximum Value |
|---|---|---|
| INTERVAL HOUR(1) TO SECOND(0) | -'9:59:59' | '9:59:59' |
| INTERVAL HOUR(1) TO SECOND(1) | -'9:59:59.9' | '9:59:59.9' |
| INTERVAL HOUR(1) TO SECOND(2) | -'9:59:59.99' | '9:59:59.99' |
| INTERVAL HOUR(1) TO SECOND(3) | -'9:59:59.999' | '9:59:59.999' |
| INTERVAL HOUR(1) TO SECOND(4) | -'9:59:59.9999' | '9:59:59.9999' |
| INTERVAL HOUR(1) TO SECOND(5) | -'9:59:59.99999' | '9:59:59.99999' |
| INTERVAL HOUR(1) TO SECOND(6) | -'9:59:59.999999' | '9:59:59.999999' |
| INTERVAL HOUR(2) TO SECOND(0) | -'99:59:59' | '99:59:59' |
| INTERVAL HOUR(2) TO SECOND(1) | -'99:59:59.9' | '99:59:59.9' |
| INTERVAL HOUR(2) TO SECOND(2) | -'99:59:59.99' | '99:59:59.99' |
| INTERVAL HOUR(2) TO SECOND(3) | -'99:59:59.999' | '99:59:59.999' |
| INTERVAL HOUR(2) TO SECOND(4) | -'99:59:59.9999' | '99:59:59.9999' |
| INTERVAL HOUR(2) TO SECOND(5) | -'99:59:59.99999' | '99:59:59.99999' |
| INTERVAL HOUR(2) TO SECOND(6) | -'99:59:59.999999' | '99:59:59.999999' |
| INTERVAL HOUR(3) TO SECOND(0) | -'999:59:59' | '999:59:59' |
| INTERVAL HOUR(3) TO SECOND(1) | -'999:59:59.9' | '999:59:59.9' |
| INTERVAL HOUR(3) TO SECOND(2) | -'999:59:59.99' | '999:59:59.99' |
| INTERVAL HOUR(3) TO SECOND(3) | -'999:59:59.999' | '999:59:59.999' |
| INTERVAL HOUR(3) TO SECOND(4) | -'999:59:59.9999' | '999:59:59.9999' |
| INTERVAL HOUR(3) TO SECOND(5) | -'999:59:59.99999' | '999:59:59.99999' |
| INTERVAL HOUR(3) TO SECOND(6) | -'999:59:59.999999' | '999:59:59.999999' |
| INTERVAL HOUR(4) TO SECOND(0) | -'9999:59:59' | '9999:59:59' |
| INTERVAL HOUR(4) TO SECOND(1) | -'9999:59:59.9' | '9999:59:59.9' |
| INTERVAL HOUR(4) TO SECOND(2) | -'9999:59:59.99' | '9999:59:59.99' |
| INTERVAL HOUR(4) TO SECOND(3) | -'9999:59:59.999' | '9999:59:59.999' |
| INTERVAL HOUR(4) TO SECOND(4) | -'9999:59:59.9999' | '9999:59:59.9999' |
| INTERVAL HOUR(4) TO SECOND(5) | -'9999:59:59.99999' | '9999:59:59.99999' |
| INTERVAL HOUR(4) TO SECOND(6) | -'9999:59:59.999999' | '9999:59:59.999999' |
Implicit and Explicit INTERVAL HOUR TO SECOND Conversion
Teradata Database performs implicit conversion from one Interval data type to another Interval type in some cases. You can also use CAST to explicitly convert one Interval type to another.
Conversions are possible only within the same INTERVAL family. For example, you may convert a YEAR interval to months, but not to days or hours.
For more information, see “Data Type Conversions” in Teradata Vantage™ - SQL Functions, Expressions, and Predicates, B035-1145.