--取字符串‘http://www.cqvip.com/QK/71905X/201602/668976778.html ’中的‘668976778’ 用reverse反轉字符
UPDATE [20161009common] SET identifier = REPLACE(right(url,CHARINDEX('/', reverse(url))-1), '.html', '')
原始字符爲 http://www.cqvip.com/QK/71905X/201602/668976778.html
結果爲 668976778