Which statement inserts new data?
Interviewer Expectations for this Question
01
Core Competency
Assesses fundamental understanding of SQL & Databases conventions, runtime behavior, and memory/performance considerations.
02
Evaluation Criteria
Hiring managers look for precision, avoidance of ambiguous jargon, and ability to explain trade-offs under real production conditions.
Comprehensive Model Answer
Verified Solution
The INSERT INTO statement is used to add new rows of data into a database table:
INSERT INTO Customers (first_name, last_name, email)
VALUES ('John', 'Doe', 'john.doe@example.com');
### Multi-Row Batch Insertion (High Performance):
INSERT INTO Customers (first_name, last_name, email)
VALUES
('Alice', 'Smith', 'alice@example.com'),
('Bob', 'Jones', 'bob@example.com');
Batching multiple rows into a single INSERT statement is orders of magnitude faster than issuing hundreds of individual INSERT statements because it eliminates network round-trips and transaction log flush overhead.
Candidate Response Strategy & Interview Tips
- Start with a concise one-sentence summary: Deliver a direct, confident answer first before expanding into nuances.
- Demonstrate real-world trade-offs: Discuss where this approach excels and when you would avoid it in production systems.
- Discuss complexity & edge cases: Proactively explain time/space complexity or boundary conditions (null values, scale limits).
- Prepare for interviewer follow-ups: Technical hiring panels frequently probe deeper into concurrency, backward compatibility, or alternative libraries.