What are the interview questions for SQL queries?
SQL Interview Questions
- What is SQL?
- What is a Database?
- Does SQL support programming language features ?
- What are the differences between SQL and PL/SQL?
- What is the difference between BETWEEN and IN operators in SQL?
- Write an SQL query to find names of employee start with ‘A’?
What is the most common query?
SELECT … FROM … is the most basic and commonly used query in SQL. It’s used for retrieving data from a table.
What are the most important SQL commands?
Some of The Most Important SQL Commands
- SELECT – extracts data from a database.
- UPDATE – updates data in a database.
- DELETE – deletes data from a database.
- INSERT INTO – inserts new data into a database.
- CREATE DATABASE – creates a new database.
- ALTER DATABASE – modifies a database.
- CREATE TABLE – creates a new table.
How to query multiple custom post types with query _ posts?
A very common WordPress function to modify the posts that are fetched on a page is called query_posts (). There are two ways to pass parameters to query_posts; you can pass an array or you can use the concatenated version.
How to answer the SQL query interview questions?
You can try solving these questions and click on the links to go to their respective answers. SQL Query to fetch records that are present in one table but not in another table. SQL query to fetch all the employees who are not working on any project. SQL query to fetch all the Employees from EmployeeDetails who joined in the Year 2020.
What do you need to know about SQL query?
For your convenience, I have compiled the top 10 questions for you. You can try solving these questions and click on the links to go to their respective answers. SQL Query to fetch records that are present in one table but not in another table. SQL query to fetch all the employees who are not working on any project.
How to write a SQL query to find an employee?
Write an SQL query to find the employee id whose salary lies in the range of 9000 and 15000. Ans. Here, we can use the ‘Between’ operator with a where clause. Ques.6. Write an SQL query to fetch those employees who live in Toronto and work under manager with ManagerId – 321. Ans.