SQL Advanced Interview Questions for Experienced Professionals ( 3 – 5 years) Basic SQL Interview Questions for Freshers 1. What is the difference between a primary key and a unique key? Primary Key: The primary key is used to uniquely identify every record in a table. It ensures that NUL...
Frequently asked SQL Server Interview Questions and Answers for freshers, intermediate, and experienced which will definitely ace your SQL Server Interview.
The following are the most popular and useful SQL interview questions and answers for fresher and experienced candidates. These questions are created specifically to familiarise you with the types of questions you might encounter during your SQL interview. According to our experiences, good interviewers ...
For years, the bulk of database developers preferred Microsoft SQL server management studio. While it has lost its position as the top priority, with IDEs such as Adminer and DBeaver taking its place, it is still one of the best in the market, owing to its history as well as what it ...
Intermediate SQL interview questions with detailed answers: 11. Find Customer Order Counts Question: Write a query to list customers who have placed more than 5 orders. Use the customers and orders tables. Answer: SELECT c.customer_id, c.customer_name, COUNT(o.order_id) AS order_count ...
SQL is an important tool in a number of careers. Our expert lays out some of the most common questions you can expect in an SQL interview.
Query 5: Write a query to access the first record from the SQL table? Sol: Syntax to find the first record from the table: ADVERTISEMENT ADVERTISEMENT SELECT*FROMTable_NameWHERERownum = 1; We can easily find the first row of any table by assigning 1 to the Rownum keyword in the WHERE ...
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The normal forms can be divided into 5 forms, and they are explained below -. First Normal Form (1NF):. This should remove all the duplicate columns from the table. Creation of tables for the related data and identification of unique columns. ...
An SQL interview question like this one shows that even though some of the advanced concepts may be easy to understand, they may be difficult to recount when suddenly faced with the question. Thus, when you prepare for SQL interview questions, ensure to revise all types of concepts. ...