You can certainly store hierarchical data in a database, but it is a bit more complicated.
A simple example is a family tree -- each person entry would have two other people as their parent. These people would all be in the same table, so you'd have to do a join back on the table that you're selecting from.
In reply to Re^2: OT: SQL and me
by talexb
in thread OT: SQL and me
by Lady_Aleena
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