In what I believe, you cannot use 2 of them in the same time because
two of them are difference database software. If you use MySQL you have
to have MySQL installed do it in MySQL way. But if you use PosthgreSQL
then you have to do it in its way. Moreover, I think, the way of storing
database of these two software are difference. If you use MySQL, they have
to store in MySQL server....

From siLenTz
I think....

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