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I wonder if it’s a problem, if a table or column name contains upper case letters. Something lets me believe databases have less trouble when everything is kept lower case. Is that true? Which databases don’t like any upper case symbol in table and column names?
I need to know, because my framework auto-generates the relational model from an ER-model.
(this question is not about whether it’s good or bad style, but only about if it’s a technical problem for any database)
It is not a technical problem for the database to have uppercase letters in your table or column names, for any DB engine that I’m aware of. Keep in mind many DB implementations use case sensitive names, so always refer to tables and columns using the same case with which they were created (I am speaking very generally since you didn’t specify a particular implementation).
For MySQL, here is some interesting information about how it handles identifier case. There are some options you can set to determine how they are stored internally. http://dev.mysql.com/doc/refman/5.0/en/identifier-case-sensitivity.html