Skip Headers
Oracle® Database SQL Language Reference
11g Release 2 (11.2)

E41084-02
Go to Documentation Home
Home
Go to Book List
Book List
Go to Table of Contents
Contents
Go to Index
Index
Go to Master Index
Master Index
Go to Feedback page
Contact Us

Go to previous page
Previous
Go to next page
Next
PDF · Mobi · ePub

Datetime Expressions

A datetime expression yields a value of one of the datetime data types.

datetime_expression::=

Description of datetime_expression.gif follows
Description of the illustration datetime_expression.gif

The initial expr is any expression, except a scalar subquery expression, that evaluates to a value of data type TIMESTAMP, TIMESTAMP WITH TIME ZONE, or TIMESTAMP WITH LOCAL TIME ZONE. The DATE data type is not supported. If this expr is itself a datetime_expression, then it must be enclosed in parentheses.

Datetimes and intervals can be combined according to the rules defined in Table 3-5. The three combinations that yield datetime values are valid in a datetime expression.

If you specify AT LOCAL, then Oracle uses the current session time zone.

The settings for AT TIME ZONE are interpreted as follows:

See Also:

Example The following example converts the datetime value of one time zone to another time zone:

SELECT FROM_TZ(CAST(TO_DATE('1999-12-01 11:00:00', 
      'YYYY-MM-DD HH:MI:SS') AS TIMESTAMP), 'America/New_York') 
   AT TIME ZONE 'America/Los_Angeles' "West Coast Time" 
   FROM DUAL;

West Coast Time
------------------------------------------------
01-DEC-99 08.00.00.000000 AM AMERICA/LOS_ANGELES