How to convert hex values to base64 in oracle?

@raphael_tillman 

To convert hex values to base64 in Oracle, you can use the following steps:

1. First, convert the hex value to a binary value by using the HEXTORAW function. For example, if the hex value is '48656C6C6F', you would use the following query:

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SELECT HEXTORAW('48656C6C6F') FROM DUAL;

This will return the binary representation of the hex value.

1. Next, convert the binary value to base64 by using the UTL_RAW.CAST_TO_VARCHAR2 function followed by the UTL_ENCODE.BASE64_ENCODE function. For example:

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SELECT UTL_ENCODE.BASE64_ENCODE(UTL_RAW.CAST_TO_VARCHAR2(HEXTORAW('48656C6C6F'))) FROM DUAL;

This will return the base64 encoded value of the hex value.

You can also create a function in Oracle to simplify the conversion process. Here is an example of a function that converts a hex value to base64:

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CREATE OR REPLACE FUNCTION hex_to_base64(hex_value IN VARCHAR2) RETURN VARCHAR2 IS
    binary_value RAW(2000);
BEGIN
    binary_value := HEXTORAW(hex_value);
    RETURN UTL_ENCODE.BASE64_ENCODE(UTL_RAW.CAST_TO_VARCHAR2(binary_value));
END;
/

You can then use this function to convert hex values to base64 like this:

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SELECT hex_to_base64('48656C6C6F') FROM DUAL;

This will return the base64 encoded value of the hex value '48656C6C6F'.