Description: Converts a string to a value of NUMBER datatype.
The string can be a BINARY_FLOAT or BINARY_DOUBLE value or a value of CHAR, VARCHAR2, NCHAR, or NVARCHAR2 datatype containing a number in the format specified by the optional format model fmt.
This function does not support CLOB data directly. However, CLOBs can be passed in as arguments through implicit data conversion.
Language: PL/SQL Highlight Mode: PLSQL Last Modified: March 05th, 2009
TO_NUMBER(expr [, fmt [,'nlsparam']])TO_NUMBER(<binary_float | binary_double | number>,'<hex mask>')RETURN<binary_float | binary_double | number>;-- convert character string data into a number:UPDATE employees SET salary = salary +TO_NUMBER('100.00','9G999D99')WHERE last_name ='Perkins';-- Note the 'nlsparam' argument in this functionSELECTTO_NUMBER('-AusDollars100','L9G999D99',' NLS_NUMERIC_CHARACTERS = '',.''
NLS_CURRENCY = ''AusDollars''
')"Amount"FROM DUAL;
Amount
-----------100-- convert a HEX to FLOATSELECTTO_NUMBER('0A','XX')FROM dual;SELECTTO_NUMBER('1F','XX')FROM dual;-- convert a HEX to DECIMALSELECTTO_NUMBER(100000,'XXXXXXXX')FROM dual;
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