Technical interview questions and answers are essential when preparing for a MySQL Interview because companies want to evaluate your understanding of database queries, joins, functions, table design, indexing, and optimization techniques. MySQL is widely used in web applications, making it one of the most important skills for developers, database engineers, and backend programmers. Companies like TCS, Wipro, Infosys, Cognizant, and Accenture frequently include MySQL questions in technical rounds and placement tests. This guide provides the most asked MySQL interview questions with explanations to help freshers and job seekers strengthen their SQL fundamentals. Preparing these questions will help you perform confidently in SQL coding tests, backend interviews, and campus placements.
Database developers can broaden their expertise through DBMS theory and MS SQL Server implementation
Showing 10 of 69 questions
21. How do you get a portion of a string?
SELECT SUBSTR(title, 1, 10) from techpreparation_questions;
22. whats the difference between CHAR_LENGTH and LENGTH?
The first is, naturally, the character count. The second is byte count. For the Latin characters the numbers are the same, but theyre not the same for Unicode and other encodings.
23. How do you convert a string to UTF-8?
SELECT (techpreparation_question USING utf8);
24. What do % and _ mean inside LIKE statement?
% corresponds to 0 or more characters, _ is exactly one character.
25. What does + mean in REGEXP?
At least one character. Appendix G. Regular Expressions from MySQL manual is worth perusing before the interview.
26. How do you get the month from a timestamp?
SELECT MONTH(techpreparation_timestamp) from techpreparation_questions;
27. How do you offload the time/date handling to MySQL?
SELECT DATE_FORMAT(techpreparation_timestamp, ‘%Y-%m-%d) from techpreparation_questions; A similar TIME_FORMAT function deals with time.
29. whats the difference between Unix timestamps and MySQL timestamps?
Internally Unix timestamps are stored as 32-bit integers, while MySQL timestamps are stored in a similar manner, but represented in readable YYYY-MM-DD HH:MM:SS format.
30. How do you convert between Unix timestamps and MySQL timestamps?
UNIX_TIMESTAMP converts from MySQL timestamp to Unix timestamp, FROM_UNIXTIME converts from Unix timestamp to MySQL timestamp.