This function does not support CLOB data directly.

Refer to TO_CHAR (number) for more information. The 'nlsparam' argument in this function has the same purpose as it does in the TO_CHAR function for number conversions. Refer to ' Format Models' for information on number formats. SELECT CAST (miles AS INT) FROM Flights - convert timestamps to text INSERT INTO mytable (textcolumn) VALUES (CAST (CURRENTTIMESTAMP AS VARCHAR (100))) - you must cast NULL as a. Use the XMLSERIALIZE operator to convert an XML type to a character type. The expr can be a number value of CHAR, VARCHAR2, NCHAR, NVARCHAR2, BINARYFLOAT, or BINARYDOUBLE. An XML value cannot be converted to any non-XML type using an explicit or implicit CAST. If you specify an expr of BINARY_FLOAT or BINARY_DOUBLE data type, then you cannot specify a format model because a float can be interpreted only by its internal representation. TONUMBER converts expr to a value of NUMBER data type. If you specify an expr of CHAR, VARCHAR2, NCHAR, or NVARCHAR2 data type, then you can optionally specify the format model fmt. Otherwise, the function converts expr to a NUMBER value. This is the format that will be used to convert string1 to a number. string1 The string that will be converted to a number. If expr evaluates to null, then the function returns null. The syntax for the TONUMBER function in Oracle/PLSQL is: TONUMBER ( string1, formatmask, nlslanguage ) Parameters or Arguments. It is used to convert a string to a number.

If expr is NUMBER, then the function returns expr. TONUMBER is one of the vital Conversion functions of Oracle. TO_NUMBER converts expr to a value of NUMBER data type.Įxpr can be any expression that evaluates to a character string of type CHAR, VARCHAR2, NCHAR, or NVARCHAR2, a numeric value of type NUMBER, BINARY_FLOAT, or BINARY_DOUBLE, or null.

Convert string to number oracle