SQL - Generate combinations of two columns

WITH a AS (
  SELECT CODE_VALUE AS CODE, DISPLAY AS DESCRIPTION, CODE_SET FROM CODE_VALUE
  WHERE CODE_SET = 69 AND ACTIVE_IND = 1
  UNION ALL
  SELECT CODE_VALUE AS CODE, DISPLAY AS DESCRIPTION, CODE_SET FROM CODE_VALUE
  WHERE CODE_SET = 71 AND ACTIVE_IND = 1
  )
  SELECT C1.CODE, C1.DESCRIPTION, C2.CODE, C2.DESCRIPTION
  FROM a C1
  CROSS JOIN a C2
  WHERE C1.CODE_SET = 69 AND C2.CODE_SET = 71
  --Alternate Combo: WHERE C1.CODE < C2.CODE
  ORDER BY C1.CODE, C2.CODE;