How Oracle Interprets Two-Digit Years : TRUNC « Date Timestamp Functions « Oracle PL/SQL Tutorial






  1. Oracle PL/SQL Tutorial
  2. Date Timestamp Functions
  3. TRUNC

The Oracle database stores all four digits of the year.

Oracle interprets the century depending on whether the YY or RR format is being used for two-digit year.

TRUNC(): truncate May 25, 2005, to the first day in the year

SQL> 
SQL>
SQL> SELECT TRUNC(TO_DATE('25-MAY-2005'), 'YYYY') FROM dual;

TRUNC(TO_
---------
01-JAN-05

SQL>








13.24.TRUNC
13.24.1.TRUNC() parameter list
13.24.2.TRUNC(x[, unit]) truncates x.
13.24.3.How Oracle Interprets Two-Digit Years
13.24.4.Truncates May 25, 2005, to the first day in the month
13.24.5.Truncates 7:45:26 P.M. on May 25, 2005 to the hour
13.24.6.Examples of the TRUNC function being applied to datetime values
13.24.7.TRUNC(date_in,'YYYY')
13.24.8.TRUNC(date_in,'MM')
13.24.9.TRUNC(): truncate May 25, 2005, to the first day in the year
13.24.10.Use TRUNC(date_variable) when you want to extract a date from a timestamp