Multiple choice

The methodology of optimising a group of SQL queries altogether with the help of common sub-expressions to save cost and time is

  1. greedy algorithm

  2. mobile database system

  3. multi query optimisation

  4. query optimisation

  5. query tree

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

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