The VXML class I had signed up for was cancelled.
I'm not even sure who to contact to ask. I'll try to dig up info...
MSSQL and Oracle fully support relational db's. The SOAP database has tables with some common fields which can be used to join tables. For instance there are 4 matchscores for every 1 matchdetail (since each team gets a score, but some things are in common like the # of small ball), and records from these two tables can be joined on fields (1)competition id, (2)match #, and (3) stage.
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