To answer this question, you need to understand the concept of tuning an SQL statement. Tuning an SQL statement involves optimizing its performance by making changes to the statement or the database structure.
Let's go through each option to understand why it is correct or incorrect:
Option A) The number of CPUs on the server - This option is incorrect because the number of CPUs on the server does not directly impact the tuning of an SQL statement. The performance of an SQL statement can be affected by the server's hardware, but it is not a consideration for tuning the statement itself.
Option B) The degree of parallelism on the tables - This option is incorrect. The degree of parallelism refers to the number of parallel processes that can be used to execute a query. While parallelism can improve performance, it is not a specific consideration for tuning an individual SQL statement.
Option C) The quality of the SQL optimization - This option is correct. The quality of the SQL optimization is an important consideration when tuning an SQL statement. SQL optimization involves analyzing the structure of the SQL statement, the database schema, and the available indexes to determine the most efficient execution plan. By optimizing the SQL, the performance of the statement can be improved.
Option D) The use of bitmap indexes - This option is incorrect. The use of bitmap indexes can improve query performance in specific scenarios, but it is not a general consideration for tuning an SQL statement.
The correct answer is C) The quality of the SQL optimization. This option is correct because optimizing the SQL statement is a crucial step in tuning its performance.