DBMS

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Across
  1. 3. A relational algebra operation used to retrieve specific rows from a database table.
  2. 5. A relational algebra operation that retrieves certain columns from a relation.
  3. 7. A relational algebra operation that pairs every tuple of one relation with every tuple of another relation.
  4. 10. A standard language used to communicate with and manipulate databases.
  5. 11. A operation which allows combining of two relations by merging pairs of tuples, one from each relation, into a single tuple
  6. 12. A term used to refer a column
Down
  1. 1. A set of attributes that uniquely identifies a tuple in a relation.
  2. 2. A term used to refer a table
  3. 4. A collection of interrelated data that is managed and accessed using a database management system.
  4. 6. A diagram that visually represents the relationships between entities in a database.
  5. 8. A term used to refer a row
  6. 9. A relational algebra operation that combines all tuples from two relations.