求助SQL选择手机号简单问题

表db_zzc中数据如下
15133429553，456897,
null
0317-8945564,15133429554,
0345-7984678,
15133429554,15133429554,
15133429554,0345-7984678,
13011486244，2517061，
我要选出其中的手机号码，我该怎么办啊？

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自己限定一下

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帮顶，学习！Up!Up!

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SQL code:
----------------------------------------------------------------
-- Author :SQL77(只为思齐老)
-- Date :2010-02-23 18:18:54
-- Version:
-- Microsoft SQL Server 2000 - 8.00.194 (Intel X86)
-- Aug 6 2000 00:57:48
-- Copyright (c) 1988-2000 Microsoft Corporation
-- Desktop Engine on Windows NT 5.1 (Build 2600: Service Pack 3)
--
----------------------------------------------------------------
--> 测试数据：#tb
if object_id('tempdb.dbo.#tb') is not null drop table #tb
go
create table #tb([NUM] varchar(25))
insert #tb
select '15133429553,456897,' union all
select null union all
select '0317-8945564,15133429554,' union all
select '0345-7984678,' union all
select '15133429554,15133429554,' union all
select '15133429554,0345-7984678,' union all
select '13011486244,2517061'
--------------开始查询--------------------------
SELECT * from
(
select PARSENAME(REPLACE(LEFT(NUM,LEN(NUM)-1),',','.'),1) AS A
from #tb WHERE NUM IS NOT NULL
UNION ALL
select PARSENAME(REPLACE(LEFT(NUM,LEN(N