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  • 电子邮箱结尾总结

    用正则表达判断格式是否合法:^[a-zA-Z0-9_]+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*

    select distinct
    substring_index(email,'@',-1)     //截取@后边的
    from
    table
    where

    email not like '%@qq.com'

    and
    email not like '%@163.com'
    AND
    email not like '%@126.com'
    AND
    email not like '%@139.com'
    AND
    email not like '%@sina.com'
    AND
    email not like '%@yahoo.com'
    AND
    email not like '%@foxmail.com'
    AND
    email not like '%@live.com'
    AND
    email not like '%@windowslive.com'
    AND
    email not like '%@vip.qq.com'
    AND
    email not like '%@yahoo.com.cn'
    AND
    email not like '%@yahoo.cn'
    AND
    email not like '%@hotmail.com'
    AND
    email not like '%@outlook.com'
    AND
    email not like '%@sohu.com'
    AND
    email not like '%@21cn.com'
    AND
    email not like '%@live.cn'
    AND
    email not like '%@aliyun.com'
    AND
    email not like '%@gz.gov.cn'
    AND
    email not like '%@gmail.com'
    AND
    email not like '%@yeah.net'
    AND
    email not like '%@vivo.com.cn'
    AND
    email not like '%@bbk.com'
    AND
    email not like '%@msn.cn'
    AND
    email not like '%@bbk.com'
    AND
    email not like '%@163.net'
    AND
    email not like '%@sina.com.cn'
    AND
    email not like '%@sina.cn'
    AND
    email not like '%@126.cn'
    AND
    email not like '%@139.com'
    AND
    email not like '%@tom.com'
    AND
    email not like '%@vip.163.com'
    AND
    email not like '%vip.126.com'
    AND
    email not like '%@vip.163.com'

    =================================================================

    select distinct
    substring_index(email,'@',-1)
    from
    table
    where
    email like '%@%.net'
    or
    email like '%@%.com.cn'
    or
    email like '%@%.cn'
    or
    email like '%@%.com'

    SELECT 'bbs.mmmm',SUBSTRING_INDEX(email,'@',-1) mailbox,
    COUNT(SUBSTRING_INDEX(email,'@',-1))  
    FROM bbs.mmmm WHERE email IS NOT NULL AND email<>'' and LENGTH(email)>0
    GROUP BY mailbox  
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  • 原文地址:https://www.cnblogs.com/zigewb/p/4552223.html
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