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Built-In Date Types, Time Types, and Time Stamp Types

The data objects of the date types, time types, and time stamp types are used to store calendar dates, times, and time stamps.

Attributes

Type Length Default Length Name
d 8 characters   Date field
t 6 characters   Time field
utclong 8 byte   Time stamp field

Value Ranges and Initial Values

Type Value Range Initial Value
d Any eight alphanumeric characters; valid values are only digits that are valid as dates in accordance with the calendar rules in the format "yyyymmdd": "yyyy" (year): 0001 to 9999, "mm" (month): 01 to 12, "dd" (day): 01 to 31 "00000000"
t Any six alphanumeric characters; valid values are only digits that are valid as times in accordance with the 24-hour clock range in the format "hhmmss". "hh" (hours): 00 to 23, "mm" (minutes): 00 to 59, "ss" (seconds): 00 to 59. "000000"
utclong Internal 8-byte integer representation of a UTC time stamp exact to 100 nanoseconds, in ISO-8601 notation between "0001-01-01T00:00:00.0000000" and "9999-12-31T23:59:59.9999999". There are 3,155,380,704,000,000,000 real values and one special initial value. 0