Query that is being ran: INSERT INTO `log_url` (`url_id`, `visitor_id`, `visit_time`) VALUES (?, ?, ?) Error that is being thrown: SQLSTATE: Integrity constraint violation: 1062 ...
Is there an easy way to check for any records in a table that breaks any constraint? The constraint was created on a populated table using "foreign_key_checks=0".
Suppose I have a table Friends with columns Friend1ID, Friend2ID. I chose to represent each friendship with two records, say (John, Jeff) and (Jeff, John). Thus, each pair of friends should show up ...
How should an object that can reference an object of multiple types be modeled in a relational schema?
Apologies for the obscure question, it may make more sense with a concrete example: In my application, I may create a portfolio that contains a set of projects. However, I may also add a ...