INTERVAL DAY TO SECOND Data Type

Teradata Vantage™ Data Types and Literals

prodname
Teradata Database
Teradata Vantage NewSQL Engine
vrm_release
16.20
category
Programming Reference
featnum
B035-1143-162K

Purpose

Identifies a field as an INTERVAL value defining a period of time in days, hours, minutes, and seconds.

Syntax



precision
The permitted range of digits for DAY, ranging from one to four.
The default is two.
fractional_seconds_precision
The fractional precision for the values of SECOND.
The default is six.
attributes
Appropriate data type, column storage, or column constraint attributes.
See Core Data Type Attributes and Storage and Constraint Attributes for specific information.

ANSI Compliance

INTERVAL DAY TO SECOND is ANSI SQL:2011 compliant.

Internal Representation of INTERVAL DAY TO SECOND

Conceptually, INTERVAL DAY TO SECOND is a record that has the following fields.

Field Name Storage Format Total Length
DAY SMALLINT 10 bytes
HOUR SMALLINT
MINUTE SMALLINT
SECOND INTEGER

External Representation of INTERVAL DAY TO SECOND

INTERVAL DAY 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 + 10)
Format: '-d(precision) hh:mm:ss'
n

where n is 1 - 6

Type: CHARACTER(precision + n + 11)
Format: '-d(precision) hh:mm:ss.s(n)'

For example, for INTERVAL DAY (4) TO SECOND(3), the value might be something like '   125 12:27:31.125 '.

The DAY field has two leading blanks. The first is for a sign, which is not present for positive intervals. The second is to preserve the fixed size of the DAY field at four digits.

Range of Values

The range of values for INTERVAL DAY TO SECOND is as follows.

Type, Precision, and Fractional Seconds Precision Minimum Value Maximum Value
INTERVAL DAY(1) TO SECOND(0) -'9 23:59:59' '9 23:59:59'
INTERVAL DAY(1) TO SECOND(1) -'9 23:59:59.9' '9 23:59:59.9'
INTERVAL DAY(1) TO SECOND(2) -'9 23:59:59.99' '9 23:59:59.99'
INTERVAL DAY(1) TO SECOND(3) -'9 23:59:59.999' '9 23:59:59.999'
INTERVAL DAY(1) TO SECOND(4) -'9 23:59:59.9999' '9 23:59:59.9999'
INTERVAL DAY(1) TO SECOND(5) -'9 23:59:59.99999' '9 23:59:59.99999'
INTERVAL DAY(1) TO SECOND(6) -'9 23:59:59.999999' '9 23:59:59.999999'
INTERVAL DAY(2) TO SECOND(0) -'99 23:59:59' '99 23:59:59'
INTERVAL DAY(2) TO SECOND(1) -'99 23:59:59.9' '99 23:59:59.9'
INTERVAL DAY(2) TO SECOND(2) -'99 23:59:59.99' '99 23:59:59.99'
INTERVAL DAY(2) TO SECOND(3) -'99 23:59:59.999' '99 23:59:59.999'
INTERVAL DAY(2) TO SECOND(4) -'99 23:59:59.9999' '99 23:59:59.9999'
INTERVAL DAY(2) TO SECOND(5) -'99 23:59:59.99999' '99 23:59:59.99999'
INTERVAL DAY(2) TO SECOND(6) -'99 23:59:59.999999' '99 23:59:59.999999'
INTERVAL DAY(3) TO SECOND(0) -'999 23:59:59' '999 23:59:59'
INTERVAL DAY(3) TO SECOND(1) -'999 23:59:59.9' '999 23:59:59.9'
INTERVAL DAY(3) TO SECOND(2) -'999 23:59:59.99' '999 23:59:59.99'
INTERVAL DAY(3) TO SECOND(3) -'999 23:59:59.999' '999 23:59:59.999'
INTERVAL DAY(3) TO SECOND(4) -'999 23:59:59.9999' '999 23:59:59.9999'
INTERVAL DAY(3) TO SECOND(5) -'999 23:59:59.99999' '999 23:59:59.99999'
INTERVAL DAY(3) TO SECOND(6) -'999 23:59:59.999999' '999 23:59:59.999999'
INTERVAL DAY(4) TO SECOND(0) -'9999 23:59:59' '9999 23:59:59'
INTERVAL DAY(4) TO SECOND(1) -'9999 23:59:59.9' '9999 23:59:59.9'
INTERVAL DAY(4) TO SECOND(2) -'9999 23:59:59.99' '9999 23:59:59.99'
INTERVAL DAY(4) TO SECOND(3) -'9999 23:59:59.999' '9999 23:59:59.999'
INTERVAL DAY(4) TO SECOND(4) -'9999 23:59:59.9999' '9999 23:59:59.9999'
INTERVAL DAY(4) TO SECOND(5) -'9999 23:59:59.99999' '9999 23:59:59.99999'
INTERVAL DAY(4) TO SECOND(6) -'9999 23:59:59.999999' '9999 23:59:59.999999'

Implicit and Explicit INTERVAL DAY 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.

Example: INTERVAL DAY TO SECOND Data Type

The following statement creates a table with an INTERVAL DAY TO SECOND column:

CREATE TABLE TimeInfo
  (Id INTEGER
  ,Offset INTERVAL DAY (4) TO SECOND (4));