Questions tagged [codds-rules]

Codd's rules are a series of practical guidelines for a database system to be considered relational. They are derived from Codd's relational calculus. They are implemented to a greater or lesser degree by all the major RDBMS providers, albeit perfectly by none of them!

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RDBMS: Proper way to store data - comma separated variables or in different fields or tables?

Fundamental question that I cannot seem to find an answer on. I have a database that stores line items from receipts along with the username and receipt number. Right now the lineItem column is just ...