TO_TIMESTAMP converts char of CHAR, VARCHAR2, NCHAR, or NVARCHAR2 data type to a value of TIMESTAMP data type.
The optional fmt specifies the format of char. If you omit fmt, then char must be in the default format of the TIMESTAMP data type, which is determined by the NLS_TIMESTAMP_FORMAT initialization parameter. The optional 'nlsparam' argument has the same purpose in this function as in the TO_CHAR function for date conversion.
This function does not support CLOB data directly. However, CLOBs can be passed in as arguments through implicit data conversion.
The following example converts a character string to a timestamp. The character string is not in the default TIMESTAMP format, so the format mask must be specified:
SELECT TO_TIMESTAMP ('10-Sep-02 14:10:10.123000', 'DD-Mon-RR HH24:MI:SS.FF')
FROM DUAL;
TO_TIMESTAMP('10-SEP-0214:10:10.123000','DD-MON-RRHH24:MI:SS.FF')
---------------------------------------------------------------------------
10-SEP-02 02.10.10.123000000 PM
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