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 Oracle PL/SQL: Convert Hex to Decimal, Decimal to Hex Jump to:  
Category: >> Oracle PL/SQL >> Convert Hex to Decimal, Decimal to Hex Bookmark and Share

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Snippet Name: Convert Hex to Decimal, Decimal to Hex

Description: Functions to convert Hex to Decimal

Example usage:
select hex2dec('FF') from dual;

select num2hex(10) from dual; and vice versa.

Also see:
» FUNCTIONS: Deterministic
» FUNCTIONS: Nested Functions
» FUNCTIONS: IF statement
» FUNCTIONS: date/time
» FUNCTIONS: Sample functions
» FUNCTIONS: drop
» FUNCTIONS: Recompile
» FUNCTIONS: DEBUG mode
» FUNCTIONS: IN OUT parameter
» FUNCTIONS: with output parameters
» FUNCTIONS: with parameters
» FUNCTIONS: without parameters
» FUNCTIONS: Create function
» FUNCTIONS: special restrictions
» FUNCTIONS: System Privileges
» IN Function
» Built-In Functions: CASE
» Built-In Functions: DECODE
» SUBST and INSTR together
» INSTR (InString)
» SUBSTR (SubString)
» String Functions: REVERSE
» String Functions: LENGTH
» String Functions: INSTR
» String Functions: CONCAT
» String Functions: CHAR
» String Functions: INITCAP
» String Functions: LOWER
» String Functions: UPPER
» Date Functions: NUMTOYMINTERVAL

Comment: (none)

Language: PL/SQL
Highlight Mode: PLSQL
Last Modified: February 27th, 2009

CREATE OR REPLACE FUNCTION hex2dec (hexnum IN CHAR) RETURN NUMBER IS
  i                 NUMBER;
  digits            NUMBER;
  result            NUMBER := 0;
  current_digit     CHAR(1);
  current_digit_dec NUMBER;
BEGIN
  digits := LENGTH(hexnum);
  FOR i IN 1..digits LOOP
     current_digit := SUBSTR(hexnum, i, 1);
     IF current_digit IN ('A','B','C','D','E','F') THEN
        current_digit_dec := ASCII(current_digit) - ASCII('A') + 10;
     ELSE
        current_digit_dec := TO_NUMBER(current_digit);
     END IF;
     result := (result * 16) + current_digit_dec;
  END LOOP;
  RETURN result;
END hex2dec;
/
show errors
 
CREATE OR REPLACE FUNCTION num2hex (N IN NUMBER) RETURN VARCHAR2 IS
  H  VARCHAR2(64) :='';
  N2 INTEGER      := N;
BEGIN
  LOOP
     SELECT RAWTOHEX(CHR(N2))||H
     INTO   H
     FROM   dual;
 
     N2 := TRUNC(N2 / 256);
     EXIT WHEN N2=0;
  END LOOP;
  RETURN H;
END num2hex;
/
show errors
 


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