DBMS Task 1

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