DBMS Task 1

Edit Answers
12345678910
Across
  1. 2. _____is used to denote the selection operation in relational algebra (Greek word)
  2. 4. An association among two or more entities.
  3. 6. A key attribute cannot have _____values
  4. 7. 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
  5. 9. In an E-R diagram attributes are represented by___________ symbol.
Down
  1. 1. A minimal super key is ______ key
  2. 2. The most commonly used operation in relational algebra for projecting a set of tuple from a relation is____
  3. 3. The _______operation performs a set union of two “similarly structured” tables
  4. 5. Properties that describe the characteristics of entities are called
  5. 7. _____ storage is easy to access because it is closer to the processor.
  6. 8. The attribute AGE is calculated from DATE_OF_BIRTH. The attribute AGE is_______ attribute
  7. 10. A __________ is the smallest unit of information that can be read from or written to the disk