I want to create a database with 10 tables . But only 5 of these tables have relation with each other and the rest 5 doesn't have relation with any other table. So my question is; can i put all these tables in one database together. because when i try, i have an error which tells me that some of the tables are not related. and also can i make relation in any type of database in mysql. because i also had a warning that my tables are not innodb type.