Search results
Learn the most popular and useful SQL interview questions and answers for fresher and experienced candidates. Find out the basics of SQL, its subsets, commands, tables, fields, keys, and more.
- Write a query to create the table in Structured Query Language. Sol: Syntax to Create a Table in SQL: CREATE TABLE table_name ( column_Name1 data type (size of the column), column_Name2 data type (size of the column), column_Name3 data type (size of the column), ...
- Write a query to insert the data into the table. Sol: Syntax to insert data into a table: INSERT INTO Table_Name VALUES (value_1, value_2, value_3, ....
- Write a query to view the specific record of the table by using the WHERE clause. Sol: Syntax to access specific records from the table: SELECT * FROM Table_Name WHERE condition;
- Write a query in SQL to find the minimum and maximum number from the integer column: Sol: Syntax to find the maximum and minimum number from the column
- What is SQL Server? SQL Server is the RDBMS system provided by Microsoft which functions mainly as retrieving and storing the data as per user request.
- What is Normalization? In RDBMS, the process of organizing data to minimize redundancy and surety of logical data integrity is called normalization.
- What is De-Normalization? It is a process of attempting to optimize the performance of a database by adding redundant data. Redundancy is introduced intentionally in a table to improve performance, and it is called de-normalization.
- What is the difference between function and stored procedure? A Function must return a value while stored procedure can return zero or n value. Functions can have only input parameter while procedures can have input/ output parameters.
- 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.
- 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 80 Top SQL Interview Questions and Answers for Beginners & Intermediate Practitioners. This article provides a comprehensive overview of 80 essential SQL questions and answers for job hunters, hiring managers, and recruiters, covering both general topics and technical questions. Updated Feb 2024 · 12 min read.
People also ask
What questions should you ask in a SQL interview?
How to answer technical SQL interview questions?
How many SQL interview questions are there?
Do you know Common SQL interview questions & answers?
SQL interview questions for beginners and professionals with sql, tutorial, examples, insert, update, delete, select, join, database, table, join.
