December 2002
Intermediate to advanced
928 pages
85h 29m
English
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DATE datatype
Oracle stores all dates and times in a standard internal format that includes the year, month, day, hour, minute, and second. The default format for inserting dates is DD-MON-RR, where RR automatically assigns years in the 50-99 range as 1950-1999 and assigns other years to the 2000-2049 range. You can change the format you use for inserting dates for an instance by changing the NLS_DATE_FORMAT initialization parameter for that instance. You do this for a session by using the ALTER SESSION SQL statement. To change the format for a specific value, you can include the appropriate parameters with the TO_DATE expression in your SQL statement.