DBMS Task 1

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Across
  1. 3. A key attribute cannot have _____values
  2. 4. In an E-R diagram attributes are represented by___________ symbol.
  3. 6. A minimal super key is ______ key
  4. 10. The attribute AGE is calculated from DATE_OF_BIRTH. The attribute AGE is_______ attribute
  5. 11. _____ storage is easy to access because it is closer to the processor.
  6. 12. The attribute name could be structured as an attribute consisting of first name, middle initial, and last name.This type of attribute is called_________ attribute
Down
  1. 1. The _______operation performs a set union of two “similarly structured” tables
  2. 2. An association among two or more entities.
  3. 5. Properties that describe the characteristics of entities are called
  4. 7. _____is used to denote the selection operation in relational algebra (Greek word)
  5. 8. The most commonly used operation in relational algebra for projecting a set of tuple from a relation is____
  6. 9. A __________ is the smallest unit of information that can be read from or written to the disk