ALTER USER was introduced in MariaDB 10.2. You are using 10.1. Cheers,Federico On Tuesday, 30 July 2019, 21:50:52 BST, Sean T Shen <seantshen@gmail.com> wrote: Hi, experts I don't really know where to ask this question in. And my question is with MariaDB....I would appreciate if somebody with a clear eye can quickly answer my question....appreciate it very much. My MariaDb is of this version: '10.1.38-MariaDB-0+deb9u1' My OS where mariadb is running is this: 'Linux d-bia-mysql-use1c-1 4.9.0-9-amd64 #1 SMP Debian 4.9.168-1+deb9u4 (2019-07-19) x86_64 GNU/Linux' I just want to do this ALTER USER 'user1'@'localhost' WITH MAX_USER_CONNECTIONS 0; And I am getting syntax error: Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'USER 'user1'@'localhost' WITH MAX_USER_CONNECTIONS 0' at line 1 What did I do wrong? Thanks _______________________________________________ Mailing list: https://launchpad.net/~maria-discuss Post to : maria-discuss@lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-discuss More help : https://help.launchpad.net/ListHelp