PL/SQL Function To Convert A Decimal Number To A Binary Number

-- Converts a given decimal number to binary.
-- Ignores decimals - only converts integer portion of a number,
-- but it retains the sign.

CREATE OR REPLACE FUNCTION f_to_binary(in_num IN NUMBER) RETURN NUMBER IS
  ln_max  NUMBER := FLOOR(LN(ABS(in_num)) / LN(2));
  ln_num  NUMBER := ABS(in_num);
  lv_bin  VARCHAR2(4000) := '0';
  ln_Sign NUMBER;
BEGIN
  IF in_num >= 0 THEN
    ln_Sign := 1;
  ELSE
    ln_Sign := -1;
  END IF;

  FOR i IN REVERSE 0 .. ln_max LOOP
    IF ln_num >= POWER(2, i) THEN
      lv_bin := lv_bin || '1';
      ln_num := ln_num - POWER(2, i);
    ELSE
      lv_bin := lv_bin || '0';
    END IF;
  END LOOP;

  RETURN TO_NUMBER(lv_bin) * ln_Sign;
END f_to

/

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Oracle Apps Guy: PL/SQL Function To Convert A Decimal Number To A Binary Number
PL/SQL Function To Convert A Decimal Number To A Binary Number
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https://www.oracleappsguy.com/2011/07/plsql-function-to-convert-decimal-to.html
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