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Does a database relationship need to be established before you can impliment a INNERJOIN In a PHP Query?
Furthermore, when I export my Database via PMA; My already created relationships to not get exported. So I’m having to re-create my relationships apun every import.
Is it possible to export with the relationships?
No. The relationship is preferred when being optimized, but a relationship is not required to use a
JOIN.When exporting your database, make sure you use the Custom – display all possible options method. You may missing an option that is not including those constraints. Another possible reason is if you’re not using InnoDb as the table engine, otherwise those constraints are discarded with MyISAM. See this question for more info.