MySQL Interview Questions and Answers
MYSQL is one of the most successful and leading pathways toward data administration careers. You will be amazed to know that this database service holds a total of 46.83% share in the relational database market. So to make your career and prepare for interviews in this field would be a good choice. Today we will help with these interviews by providing you with some MYSQL Interview Questions and Answers. MYSQL is one of the most popular database technologies used in the database industry. Popular companies like Microsoft, Amazon, Oracle, and IBM are using this technology on a vast basis to manage and store their data. According to one survey, nowadays more than 90% of organizations are using OSDBMS i.e. Open Source Database Management System. But to handle this database, professionals must know the MYSQL programming language.
|Quick Facts About MySQL
|What is the latest version of MySQL?
|8.0.22 released in 19th October 2020
|When was MySQL first released?
|23 May 1995
|Who developed MySQL?
|What language does MySQL use?
|C and C++ language
|GNU Public License
MySQL Query Interview Questions
It is a table that points to a table in another MySQL database instance. It can be seen as a view of this remote database. Other RDBMS have the same concepts for example database links.
The maximum size of the HEAP table can be controlled by the MySQL config variable called max_heap_table_size.
It is a language but not a Programming Language. It is a relational database management system.
- Data Security
- It is used to retrieve large amounts of records from a database quickly and efficiently.
- On-Demand Scalability
- High Performance
- Excellent Uptime
- Reduced Total Cost of Ownership
Storage engines are Mysql components, that can handle the operations for different table types to store and manage information in a database.
- ARCHIVE etc
ALTER TABLE EnterTableName ENGINE = EnterEngineName;
SELECT id, GROUP_CONCAT(department SEPARATOR ' ') AS department FROM employee group by id;
Between operator is used to select a range of data between two values. It can be texts, numbers, and dates, etc.
Select * from TABLENAME where FIELDNAME between VALUE1 and VALUE2
IN operator is used to check for a value in the given set of values.
Select * from TABLENAME where FIELDNAME IN ('VALUE1','VALUE2',...)
You can use this query in your PHPMyAdmin SELECT version();
In MYSQL Database, data is stored in tabular form and that is why we also call it a Relational Database Management System. With the help of it, users can develop an infinite number of applications but it is mainly used for web applications. Talking about platforms, it can run on various platforms like LINUX, UNIX, and WINDOWS and is reliable, fast, and very easy to use. We hope these questions will help you to clear your core concepts regarding MYSQL. Let us help you with some short and important tips which might help you with your interviews-
- MYSQL is a programming language, so always avoid YES and NO answers.
- If you don’t know the answer, simply say I don't know rather than pretending you know.
- Always carry a pen and notepad with you.
- If you are stuck somewhere don’t panic, just stay calm and think out loud.
- Go with the expectation that you will reject a lot, as “Failure is the key to Success”.