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The one caveat with this is the possibility of having orphan records in X, which have no junction records in X_A, X_B, or X_C. This can be handled with triggers and/or stored procedures.scriptin– scriptin2017-07-14 20:17:22 +00:00Commented Jul 14, 2017 at 20:17
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That solution is not equivalent to what OP wants.Tulains Córdova– Tulains Córdova2017-07-14 20:30:57 +00:00Commented Jul 14, 2017 at 20:30
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@TulainsCórdova: ... because?Doc Brown– Doc Brown2017-07-14 20:57:45 +00:00Commented Jul 14, 2017 at 20:57
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With that solution, how would you manage the fact that the relationships X->A and X->B have to be mutually exclusive?Tulains Córdova– Tulains Córdova2017-07-14 21:57:56 +00:00Commented Jul 14, 2017 at 21:57
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The issue is this would create many-to-many relationships. As soon as you add association tables, there's nothing preventing one x object from being attached to multiple A objets. That's not a deal breaker, but it's less than ideal.gardenhead– gardenhead2017-07-15 01:41:02 +00:00Commented Jul 15, 2017 at 1:41
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