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3 days ago · Prepare for SQL developer interviews with 70+ questions and answers on SQL basics, data types, constraints, views, joins, subqueries, and more. Learn SQL for MySQL, Oracle, PostgreSQL, and other databases.
May 29, 2024 · Prepare for your SQL interview with over 100 questions and exercises, organized by topic and difficulty level. Find tips, cheat sheets, and courses to review your SQL knowledge and skills.
- Agnieszka Kozubek-Krycuń
- What is Database? A database is an organized collection of data, stored and retrieved digitally from a remote or local computer system. Databases can be vast and complex, and such databases are developed using fixed design and modeling approaches.
- What is DBMS? DBMS stands for Database Management System. DBMS is a system software responsible for the creation, retrieval, updation and management of the database.
- What is RDBMS? How is it different from DBMS? RDBMS stands for Relational Database Management System. The key difference here, compared to DBMS, is that RDBMS stores data in the form of a collection of tables and relations can be defined between the common fields of these tables.
- What is SQL? SQL stands for Structured Query Language. It is the standard language for relational database management systems. It is especially useful in handling organized data comprised of entities (variables) and relations between different entities of the data.
This comprehensive guide provides a curated list of SQL Server interview questions and answers, covering topics from basic concepts to advanced techniques, to help you prepare for your next data-related interview.
- Write a SQL query to fetch “FIRST_NAME” from the Student table in upper case and use ALIAS name as STUDENT_NAME. SELECT upper(FIRST_NAME) as STUDENT_NAME from Student;
- Write a SQL query to fetch unique values of MAJOR Subjects from Student table. SELECT DISTINCT MAJOR from STUDENT; or SELECT MAJOR FROM STUDENT GROUP BY(MAJOR);
- Write a SQL query to print the first 3 characters of FIRST_NAME from Student table. SELECT SUBSTRING(FIRST_NAME, 1, 3) FROM Student;
- Write a SQL query to find the position of alphabet (‘a’) int the first name column ‘Shivansh’ from Student table. SELECT INSTR(FIRST_NAME, 'a') FROM Student WHERE FIRST_NAME = 'Shivansh';
The following are the most popular and useful SQL interview questions and answers for fresher and experienced candidates. These questions are created specifically to familiarise you with the types of questions you might encounter during your SQL interview.
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Jun 26, 2024 · Learn SQL concepts, Oracle, MS SQL Server, and MySQL database with this comprehensive guide. Find out the most frequently asked interview questions on SQL and their answers for beginners and experienced professionals.
