You can convert character strings to numeric values by using the CAST(string AS DECIMAL) or CAST(string AS SIGNED INTEGER) function as shown in the following examples:SELECT CAST('4123.45700' AS DECIMAL) FROM DUAL; 4123.46 -- Very poor conversionSELECT CAST('4.12345700e+3' AS DECIMAL) FROM DUAL; 4123.46 -- Very poor conversionSELECT CAST('4123.45700' AS SIGNED INTEGER) FROM DUAL; 4123SELECT CAST('4.12345700e+3' AS SIGNED INTEGER) FROM DUAL; 4 -- Very poor conversion