ORACLE SQL 判断字符串是否为数字的语句

日期：2015/6/28来源: IT猫扑网

记录一下：

    SELECT *
      FROM (SELECT TRANS_TYPE, TRANS_TYPE_NAME
FROM QGIS_TRANS_TYPE
WHERE NVL(FLAG, 'N') = 'Y'
   AND DECODE((REPLACE(TRANSLATE(TRIM(SUBSTR(TRANS_TYPE_NAME, 1, 2)),
   '0123456789',
   '00000000000'),
     '0',
     NULL)),
NULL,
TO_NUMBER(TRIM(SUBSTR(TRANS_TYPE_NAME, 1, 2)))) = SUBSTR(:TRANSACTIONS.SEND_CC_CODE,3,2)
      UNION ALL
      SELECT TRANS_TYPE, TRANS_TYPE_NAME
FROM QGIS_TRANS_TYPE
WHERE NVL(FLAG, 'N') = 'Y'
   AND DECODE((REPLACE(TRANSLATE(TRIM(SUBSTR(TRANS_TYPE_NAME, 1, 2)),
   '0123456789',
   '00000000000'),
     '0',
     NULL)),
NULL,
TO_NUMBER(TRIM(SUBSTR(TRANS_TYPE_NAME, 1, 2)))) IS NULL)
     ORDER BY TRANS_TYPE