mysql - 在 Mysql 中验证电子邮件地址

Question

此查询创建一个 mysql View ，该 View 在一个表中捕获错误的电子邮件地址格式。因此，如果在其中插入具有 rtrrg.com 作为电子邮件的行，它将被记录在 View 中。我的问题是，如何使 View 跟踪不止一张表。第二张 table 。

SQL

CREATE VIEW `invalid_emails` AS 
  select `table_with_email_column`.`email` AS `invalidemail` 
    from `table_with_email_column` 
   where ((locate(_latin1'', ltrim(rtrim(`table_with_email_column`.`email`))) <> 0) 
      or (left(ltrim(`table_with_email_column`.`email`), 1) = _latin1'@') 
      or (right(rtrim(`table_with_email_column`.`email`), 1) = _latin1'.') 
      or ((locate(_latin1'.', `table_with_email_column`.`email`,locate(_latin1'@', `table_with_email_column`.`email`)) -  locate(_latin1'@', `table_with_email_column`.`email`)) <= 1) 
      or ((length(ltrim(rtrim(`table_with_email_column`.`email`))) -  length(replace(ltrim(rtrim(`table_with_email_column`.`email`)), _latin1'@', _latin1''))) <> 1) 
      or (locate(_latin1'.', reverse(ltrim(rtrim(`table_with_email_column`.`email`)))) < 3) 
      or (locate(_latin1'.@', `table_with_email_column`.`email`) <> 0) 
      or (locate(_latin1'..', `table_with_email_column`.`email`) <> 0));

Answer 1

您可以使用纯 SELECT 来验证电子邮件地址:

SELECT * FROM `users` WHERE `email` NOT REGEXP '^[^@]+@[^@]+\.[^@]{2,}$';

现在对于跟踪多个表的问题，您可以使用逗号分隔的表名吗？

SELECT * FROM `users`, `customers`, `clients`
         WHERE `email` NOT REGEXP "^[a-zA-Z0-9][a-zA-Z0-9.!#$%&'*+-/=?^_`{|}~]*?[a-zA-Z0-9._-]?@[a-zA-Z0-9][a-zA-Z0-9._-]*?[a-zA-Z0-9]?\\.[a-zA-Z]{2,63}$";