Performance issues delayed the introduction of relational database management systems as viable commercial products.
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Q19: Consider relations X and Y, each representing
Q20: All of the following events and factors
Q21: The columns of a relation can be
Q22: A foreign key must have unique values
Q23: A relational DBMS is capable of automating
Q25: Storing a many-to-many relationship in a relational
Q26: A relation's primary key field can have
Q27: In a one-to-many binary relationship, the primary
Q28: No two rows of a relation are
Q29: The result of a relational operation will
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