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WAMP refers to the WampServer software stack for the Microsoft Windows operating system, consisting of the Apache web server, OpenSSL for SSL support, MySQL database and PHP programming language. Be sure to add additional appropriate tags such as which version of MySQL, and type of problem.
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Mysql - how to create an id column for a specific column
I am assuming visit_times means the nth time a user has visited.
You can't do it with AUTO_INCREMENT. You have 2 options:
1- Inserting visit_times value while inserting rows:
SET @visitTimes = IFNULL( …