Mysql常用sql方法

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1、mysql 导出文件:

   SELECT `pe2e_user_to_company`.company_name, `pe2e_user_to_company`.company_code, `users`.name, `users`.uid, `users`.mail, `pe2e_email_notification_email`.`email_cc` FROM `users` , `pe2e_user_to_company` LEFT JOIN `pe2e_email_notification_email` ON `pe2e_user_to_company`.`uid` = `pe2e_email_notification_email`.`uid` WHERE `users`.`uid` = `pe2e_user_to_c