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Feb 15, 2024 · Prepare for your SQL interview with this comprehensive guide that covers general and technical questions for job hunters and hiring managers. Learn about SQL flavors, commands, statements, functions, queries, and more.
- What is SQL? SQL stands for Structured Query Language. It is a language used to interact with the database, i.e to create a database, to create a table in the database, to retrieve data or update a table in the database etc.
- What is a Database? A Database is defined as a structured form of data which is stored in a computer or data in an organised manner and can be accessed in various ways.
- Does SQL support programming language features ? It is true that SQL is a language but it does not support programming as it is not a programming language, it is a command language.
- What are the differences between SQL and PL/SQL? Ans: Some common differences between SQL and PL/SQL are as shown below: SQL. PL/SQL. SQL is a query execution or commanding language.
May 29, 2024 · Prepare for SQL interviews 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
- 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';
- 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.
In this guide, we’ve explored a range of example SQL interview questions, covering essential topics like SQL functions, debugging techniques, efficient query writing, and performance optimization. These questions are designed to test both foundational knowledge and practical problem-solving skills— ideal for junior to senior-level ...
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Test your SQL skills with 41 challenging questions and answers from Toptal, a network of freelance developers. Learn how to use JOIN, UNION, EXISTS, RANK, and more in SQL queries.
