What is the SELECT statement?
Why Interviewers Ask This
This is a classic screening question for MySQL / SQL roles. Hiring managers ask it early in interviews to gauge your baseline understanding and determine if you can communicate technical concepts clearly.
Answer
The SELECT statement is the most used SQL command — it retrieves data from one or more tables. Basic syntax: SELECT column1, column2 FROM table_name WHERE condition ORDER BY column ASC/DESC LIMIT n;. Key clauses: SELECT * — retrieves all columns (avoid in production — specify columns explicitly for clarity and performance); FROM — specifies the table(s); WHERE — filters rows (uses comparison operators: =, !=, <, >, BETWEEN, IN, LIKE, IS NULL); ORDER BY — sorts results (ASC default, DESC for descending); LIMIT — restricts number of rows returned; OFFSET — skips rows (for pagination: LIMIT 10 OFFSET 20); DISTINCT — removes duplicate rows: SELECT DISTINCT city FROM users; Aliases: SELECT first_name AS name — rename columns in output. Execution order (not syntax order): FROM → JOIN → WHERE → GROUP BY → HAVING → SELECT → ORDER BY → LIMIT.
Common Mistake
Many candidates answer correctly but can't explain the 'why'. Always be prepared to justify your answer with a concrete example or use case from your MySQL / SQL experience.