How to make synchronize the staging table with three connections?

tell me how to do the synchronization staging table with three connections?

Staging table
A_B_C_
a_id | b_id | c_id

Or in General it's a bad idea to do so?
April 3rd 20 at 18:47
1 answer
April 3rd 20 at 18:49
Solution
If You have only one level of nesting ie

Category
under category

Then look at this

If the nesting is theoretically infinite, nested set as advised by your
the nesting level is one, Yes - hermina_Will commented on April 3rd 20 at 18:52
@hermina_Will, well, look at the link which I have off, or take a nested set, then if you decide that vaginata can be more, especially no need to rewrite is - Caitlyn91 commented on April 3rd 20 at 18:55

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