December 2002
Intermediate to advanced
928 pages
85h 29m
English
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INTERVAL datatypes
Oracle9i introduces two new interval datatypes:
- INTERVAL YEAR TO MONTH
Stores a period of time using the year and month datetime fields with the following syntax:
INTERVAL YEAR (
year_precision) TO MONTHwhere year_precision is the number of digits used to specify the number of years, with a default value of 2.
- INTERVAL DAY TO SECOND
Stores a period of time using the day, hour, minute, and seconds datetime fields. Defined with the following syntax:
INTERVAL DAY (
day_precision) TO SECOND (fractional_second_precision)where day_precision is the number of digits used to specify the number of days, from 0 to 9, with a default value of 2. fractional_second_precision specifies the number of digits in the fractional portion of the seconds, from 0 to 9, with a default of 6.
For more information on assigning values to INTERVAL datatypes, see the descriptions of the INTERVAL functions in Chapter 8.
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