hi，
when I open my SQL DB and select one project,the gINT prompted me,your database exists, but the data structure is invalid. So why I have is error? how to resolve it?
It is hard to say with just that information. Was the SQL db created from gINT by upsizing the project to create the SQL DB? Some people try to connect to a non gINT SQL db and can get an error similar to this.
Here is enterprise user guide explaining how to create and use a SQL db in gINT