3. What is SQL? SQL stands for Structured Query Language , and it is used to communicate with the Database. This is a standard language used to perform tasks such as retrieval, updation, insertion and deletion of data from a database. 7. What is a unique key? A Unique key constraint ...
SQL Job Interview Questions and Answers 1 :: What is SQL (Structured Query Language)? SQL is an English like language consisting of commands to store, retrieve, maintain & regulate access to your database.Read More 2 :: What is the SQL*Plus? SQL*Plus is an application that recognizes &...
Comprehensive, community-driven list of essential SQL interview questions. Whether you're a candidate or interviewer, these interview questions will help prepare you for your next SQL interview ahead of time.
After we run the query our table will look like this:ConclusionSQL is a high-demand skill today and a language that should not be missing from the arsenal of programmers. This guide listed out a few of the most asked SQL interview questions and gave their answers to begin with, to keep...
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 ...
Here are some e-commerce SQL interview questions: 1.Product Catalog Query: Write an SQL query to retrieve the names and prices of all products in the product catalog. 2.Order Summary Query: Create an SQL query to calculate the total revenue generated from orders placed in the last month. ...
For more practice with JOIN clauses, check out our article on JOIN interview questions! 3. Why is this query not returning the expected results? We have 1000 total rows in the orders table: SELECT * FROM orders; -- 1000 rows in set (0.05 sec) And 23 of those orders are from the us...
Softwaretesting-QuestionsandAnswers-SQLInterviewQuestions Q.WhatdoesSQLstandfor? A.StructuredQueryLanguage Q.Whatisaprimarykey? A.Primarykey:EachrowofthedatainatableuniquelyidentifiedbyaPrimaryKey Thecolumn(columns)thathascompletelyuniquedatathroughoutthetableis ...
SQL Server Interview Questions and Answers – Part 2 What is the difference between clustered and a non-clustered index? Aclustered indexis a special type of index that reorders the way records in the table are physically stored. Therefore table can have only one clustered index. The leaf ...
In this article, we will go over the most common SQL Joins interview questions that are asked of both new and experienced developers. We will cover these topics: What Do SQL Developers Do? Topics to Prepare for Your SQL Joins Interview Top SQL Joins Interview Questions and Answers SQL Query...