Functions, 148 of 177

TO_TIMESTAMP_TZ

Syntax

to_timestamp_tz::=

Text description of functions72.gif follows

Purpose

TO_TIMESTAMP_TZ converts char of CHAR, VARCHAR2, NCHAR, or NVARCHAR2 datatype to a value of TIMESTAMP WITH TIME ZONE datatype.

Note:

This function does not convert character strings to TIMESTAMP WITH LOCAL TIME ZONE. To do this, use a CAST function, as shown in CAST .

The optional fmt specifies the format of char. If you omit fmt, then char must be in the default format of the TIMESTAMP WITH TIME ZONE datatype. The optional 'nlsparam' has the same purpose in this function as in the TO_CHAR function for date conversion.

Examples

The following example converts a character string to a value of TIMESTAMP WITH TIME ZONE:

SELECT TO_TIMESTAMP_TZ('1999-12-01 11:00:00 -8:00',
   'YYYY-MM-DD HH:MI:SS TZH:TZM') FROM DUAL;

TO_TIMESTAMP_TZ('1999-12-0111:00:00-08:00','YYYY-MM-DDHH:MI:SSTZH:TZM')
--------------------------------------------------------------------
01-DEC-99 11.00.00.000000000 AM -08:00

The following example casts a null column in a UNION operation as TIMESTAMP WITH LOCAL TIME ZONE using the sample tables oe.order_items and oe.orders:

SELECT order_id, line_item_id,
   CAST(NULL AS TIMESTAMP WITH LOCAL TIME ZONE) order_date
   FROM order_items
UNION
SELECT order_id, to_number(null), order_date
   FROM orders;

  ORDER_ID LINE_ITEM_ID ORDER_DATE
---------- ------------ -----------------------------------
      2354            1
      2354            2
      2354            3
      2354            4
      2354            5
      2354            6
      2354            7
      2354            8
      2354            9
      2354           10
      2354           11
      2354           12
      2354           13
      2354              14-JUL-00 05.18.23.234567 PM
      2355            1
      2355            2
...