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。