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Oracle® Database Reference
11g Release 2 (11.2)

E40402-10
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NLS_DATE_FORMAT

Property Description
Parameter type String
Syntax NLS_DATE_FORMAT = "format"
Default value Derived from NLS_TERRITORY
Modifiable ALTER SESSION
Range of values Any valid date format mask but not exceeding a fixed length
Basic No

NLS_DATE_FORMAT specifies the default date format to use with the TO_CHAR and TO_DATE functions. The default value of this parameter is determined by NLS_TERRITORY.

The value of this parameter can be any valid date format mask, and the value must be surrounded by double quotation marks. For example:

NLS_DATE_FORMAT = "MM/DD/YYYY"

Note:

The value of this initialization parameter NLS_DATE_FORMAT is used to initialize the session value of this parameter, which is the actual value referenced by the SQL query processing. This initial value is overridden by a client-side value if the client uses the Oracle JDBC driver or if the client is OCI-based and the NLS_LANG client setting (environment variable) is defined. The initialization parameter value is, therefore, usually ignored.

See Also: