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GATE Overflow Test Series | Databases | Test 1 | Question: 9

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Which of the following statements is/are correct? (Mark all the appropriate choices)

  1. For every relational algebra expression there is an equivalent expression in the relational calculus
  2. For every safe tuple relational calculus expression there is an equivalent relational algebra expression
  3. For every safe domain relational calculus expression there is an equivalent relational algebra expression
  4. For every safe tuple relational calculus expression there is an equivalent safe domain relational calculus expression
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All the given options are correct. Domain/tuple relational calculus and relational algebra have the same expressive power.
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GATE Overflow Test Series | Databases | Test 1 | Question: 13
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