How to upgrade the database?

[Dudeson]

I got this error message says "You have an error in your SQL Syntax

Where do i find upgrade.php and if i execute that, will it cause any further issues?

[Sir Osis of Liver]

Ignore the version error, there've been no database changes in 2.0 branch.  The syntax error may be due to a poorly configured mariadb implementation.

[Kindred]

Maria db requires some manual code changes, depending on the mariadb config...

Incidentally, mariadb is not officially supported in 2.0.x