Complete the sentence to explain why query optimization helps.
Query optimization reduces execution time by [1] the number of operations needed.Query optimization works by reducing the number of operations, which makes the query run faster.
Complete the sentence to describe how query optimization affects data access.
Optimization helps by [1] the amount of data the database needs to scan.By reducing the data scanned, the database spends less time reading unnecessary information.
Fix the error in the sentence about query optimization.
Query optimization [1] the execution time by choosing efficient query plans.Optimization reduces execution time by selecting better ways to run queries.
Fill both blanks to complete the explanation of query optimization.
Query optimization [1] the use of indexes and [2] unnecessary data retrieval.
Optimization improves index use and reduces fetching data that is not needed, speeding up queries.
Fill all three blanks to explain how query optimization reduces execution time.
It [1] the query plan, [2] the number of joins, and [3] the data scanned.
Optimization simplifies the plan, reduces joins, and minimizes data scanned to make queries faster.