Ad
related to: sql interview questions for experiencedWe Rank Your Applicants According to Test Scores Certified by Our Experts. Spend Valuable Time Focusing On The Best Candidates With Proven Job Skills Tests
Search results
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
May 30, 2024 · Prepare for SQL interview questions for experienced professionals with this curated list of 40+ common and advanced topics. Learn SQL concepts, queries, commands, normalization, denormalization, collation, CASE statements and more.
- Abhinav Rawat
- SQL Interview Questions and Answers For Freshers
- Intermediate SQL Interview Questions and Answers
- Advanced SQL Interview Questions and Answers
- GeneratedCaptionsTabForHeroSec
1.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. SQL is an ANSI(American National Standards Institute) standard. Using SQL, we can do many things. For example – we can execute queries, we can insert records into a table, can update records, can create a database, can create a table, can delete a table, etc.
2. What is a database?
A Database is defined as a structured form of data storage in a computer or a collection of data in an organized manner and can be accessed in various ways. It is also the collection of schemas, tables, queries, views, etc. Databases help us with easily storing, accessing, and manipulating data held on a computer. The Database Management System allows a user to interact with the database.
3. 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. We do not have conditional statements in SQL like for loops or if..else, we only have commands which we can use to query, update, delete, etc. data in the database. SQL allows us to manipulate data in a database.
32. What are the differences between SQL and PL/SQL?
Some common differences between SQL and PL/SQL are as shown below:
33. What is the difference between BETWEEN and IN operators in SQL?
BETWEEN: The BETWEENoperator is used to fetch rows based on a range of values. For example, This query will select all those rows from the table. Students where the value of the field ROLL_NO lies between 20 and 30. IN:The IN operator is used to check for values contained in specific sets. For example, This query will select all those rows from the table Students where the value of the field ROLL_NO is either 20 or 21 or 23.
34. Write an SQL query to find the names of employees starting with ‘A’.
The LIKE operator of SQL is used for this purpose. It is used to fetch filtered data by searching for a particular pattern in the where clause. The Syntax for using LIKE is, The required query is: You may refer to this article WHERE clausefor more details on the LIKE operator.
48. Name different types of case manipulation functions available in SQL.
There are three types of case manipulation functions available in SQL. They are, 1. LOWER: The purpose of this function is to return the string in lowercase. It takes a string as an argument and returns the string by converting it into lower case. Syntax: 1. UPPER: The purpose of this function is to return the string in uppercase. It takes a string as an argument and returns the string by converting it into uppercase. Syntax: 1. INITCAP: The purpose of this function is to return the string wi...
49. What are local and global variables and their differences?
1. Global Variable: In contrast, global variables are variables that are defined outside of functions. These variables have global scope, so they can be used by any function without passing them to the function as parameters. 1. Local Variable: Local variables are variables that are defined within functions. They have local scope, which means that they can only be used within the functions that define them.
50. Name the function which is used to remove spaces at the end of a string?
In SQL the spaces at the end of the string are removed by a trim function. Syntax:
Prepare for your SQL interview with 70+ questions and answers for freshers, intermediate and advanced levels. Learn SQL basics, data types, constraints, views, joins, normalization, denormalization and more.
Mar 21, 2024 · Test your SQL skills with 15 coding questions that seem easy but have hidden traps. Learn how to join tables, use functions, and avoid common pitfalls in SQL queries.
Mar 25, 2024 · Test your SQL skills with these 20 challenging questions from real interviews at Stripe, Facebook, McKinsey, and Apple. Each question has a detailed solution and explanation to help you prepare for your next SQL interview.
Learn 80 essential SQL questions and answers for job hunters and hiring managers, covering general topics and technical skills. Find out what SQL is, its applications, commands, functions, queries, and more.
People also ask
What questions should I ask in a SQL exam?
What are SQL interview questions?
How to prepare for SQL interview?
How to answer technical SQL interview questions?
Jun 24, 2024 · Student Table. Program Table. Scholarship Table. Let us start by taking a look at some of the most asked SQL Query interview questions: 1. 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; Output: SHIVANSH. UMESH. RAKESH. RADHA.
