MySQL 电话号码筛选
2021/12/15 2:21:59
本文主要是介绍MySQL 电话号码筛选,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
类型一,AAAA
select phone from user_info where LENGTH(phone) = 11 AND SUBSTRING(phone,8,1) = SUBSTRING(phone,9,1) AND SUBSTRING(phone,9,1) = SUBSTRING(phone,10,1) AND SUBSTRING(phone,10,1) = SUBSTRING(phone,11,1)
类型二,AAAB
select phone from user_info where LENGTH(phone) = 11 AND SUBSTRING(phone,8,1) = SUBSTRING(phone,9,1) AND SUBSTRING(phone,9,1) = SUBSTRING(phone,10,1) AND SUBSTRING(phone,10,1) != SUBSTRING(phone,11,1)
类型三,AABB
select phone from user_info where LENGTH(phone) = 11 AND SUBSTRING(phone,8,1) = SUBSTRING(phone,9,1) AND SUBSTRING(phone,9,1) != SUBSTRING(phone,10,1) AND SUBSTRING(phone,10,1) = SUBSTRING(phone,11,1)
类型四,ABBB
select phone from user_info where LENGTH(phone) = 11 AND SUBSTRING(phone,8,1) != SUBSTRING(phone,9,1) AND SUBSTRING(phone,9,1) = SUBSTRING(phone,10,1) AND SUBSTRING(phone,10,1) = SUBSTRING(phone,11,1)
类型五,ABCD
select phone from user_info where LENGTH(phone) = 11 AND SUBSTRING(phone,9,1) = (SUBSTRING(phone,8,1) + 1) AND SUBSTRING(phone,10,1) = (SUBSTRING(phone,9,1) + 1) AND SUBSTRING(phone,11,1) = SUBSTRING(phone,10,1)
ps:
SUBSTRING(string,position,length) :截取字符串 参数说明: str: 要提取的字符串。 position: 起始位置。用于指定起始位置,可以是正整数或负整数。 如果为正整数,表示自正整数开始,截取字符串(起始坐标从1开始); 如果为负整数,表示就从倒数第几个开始截取。 length: 截取字符串的长度/个数。
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