is this a one-off or will you be loading 11 files from other sources on a
regular basis? do they tables already exist?
If you do not properly design a database - you might as well use spreadsheets or
even worse... MSAccess. Without a proper design, you will unnecessarily
duplicate information, have poor performance and waste programming time to make
all of the data fit together. There is a reason it is called "relational".
There must exist a relationship between tables. There are very few reasons to
have a table that does not have a relation to at least one other table.
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