Multiple choice

Which of the following methodologies is used for optimising a group of SQL queries with the help of common sub-expressions to save cost and time?

  1. Greedy algorithm

  2. Mobile database system

  3. Query optimisation

  4. Multi-query optimisation

  5. Query tree

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Multi-query optimisation is a methodology of optimising a group of SQL queries with the help of common sub-expressions to save cost and time.