DBMS Task 1

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