MySQL:

db, err = xorm.NewEngine("mysql", "username:password@tcp(host:3306)/dbname?charset=utf8")

PostgreSQL:

db, err = xorm.NewEngine("postgres", "user=test password=test123 dbname=testdb host=127.0.0.1 port=5432 sslmode=disable")

sqlite3:

db,    err      =     xorm.NewEngine("sqlite3", "./test.db")