A relational database is a database consisting of relation variables (which are also called *relvars*, *R-tables* or just *tables*). The definition, manipulation and integrity rules of relational databases are based on relational operations equivalent to or similar to the Relational Algebra and Calculus.
I wanted to know what is the equivalent in GROUP BY, SORT BY and ORDER BY in algebra relational ?
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ms-access database-design relational-database lookup-tablesSorry for that noob question but is there any real needs to use one-to-one relationship with tables in your database? …
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