Which of the following is a CASE SQL statement?

Correct option is B

The CASE SQL statement is used to establish IF-THEN-ELSE logic within SQL queries. It allows conditional operations by evaluating conditions and returning specific values when those conditions are met. The syntax is highly versatile and useful for generating computed or conditional columns in queries.
Important Key Points:
1. CASE Statement Role: Implements conditional logic directly in SQL queries, enabling decision-making based on data values.
2. Usage: Often used for data transformation or conditional aggregation in SELECT statements.
3. Flexibility: Allows multiple conditions to be checked and appropriate results to be returned for each condition.
Knowledge Booster:
· Data Definition: Handled by SQL commands like CREATE, ALTER, and DROP, not by the CASE statement.
· Loops in SQL: Loops are implemented using procedural SQL (e.g., PL/SQL or T-SQL), not with CASE statements.
· IF-THEN-ELSE Logic: Specifically enabled by CASE in SQL, allowing evaluations within queries.