32. What are UNION, MINUS, and INTERSECT in SQL? UNION: Union operation combines results from two queries, and removes duplicates. MINUS: Minus operation returns rows from the first query that are not in the second query. INTERSECT: Intersect returns rows that are common to both queries. 33...
In this article, you will learn many simple and complex SQL queries asked in IT interviews. Let's take two tables which help in solving various queries. The name of the first table isStudent,and the name of the second table isSubject. The Student table consists ofStudent_ID, Stu_Name, ...
Here, we share the basic and advanced SQL queries asked in interview questions. Our tutorials explain the SQL syntax and commands in a super easy way.
Landing a job that requires SQL skills often means preparing for a challenging interview. SQL is a foundational technology for database management, so employers test candidates on various concepts ranging from basic to advanced-level queries. This blog covers common SQL interview questions and their ...
This tokenization process ensures accurate parsing and evaluation of SQL queries, enabling the server to handle database operations efficiently. PostgreSQL Advanced Interview Questions 26. When should a developer use PostgreSQL? Developers should choose PostgreSQL when they require a dependable and feature-...
reserved for performing particular operations. They are also used in SQL queries. We can primarily use these operators within the WHERE clause of SQL commands. It's a part of the command to filters data based on the specified condition. The SQL operators can be categorized into the following ...
This is one of the tricky SQL Interview Questions. Interviewer may ask you this question in another way as what are the advantages of Union All over Union. Both Union and Union All concatenate the result of two tables but the way these two queries handle duplicates are different. ...
What is Dynamic SQL, and when can you use it? Dynamic SQL is a feature you can use to modify your queries at run time based on one or more criteria, including the current date, the current time, or any other criteria you choose. ...
Absolutely! Here are the modified SQL queries with each question and its corresponding answer separated: 11. Find the third maximum salary from the “salaries” table without using the LIMIT clause. Answer: SELECT salary FROM salaries ORDER BY salary DESC ...
A table stores and retrieves data from persistent storage whenever the user wants. On the other side, the view is only a virtual table based on the result of some SQL queries, meaning that this will disappear after the session ends. ...