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3 days ago · By executing queries, SQL can create, update, delete, and retrieve data in databases like MySQL, Oracle, PostgreSQL, etc. Overall, SQL is a query language that communicates with databases. In this article, we cover 70+ SQL Interview Questions with answers asked in SQL developer interviews at MAANG and other high-paying companies.
Jun 24, 2024 · Here, we will cover 45+ MySQL interview questions with answers that are commonly asked during interviews for Data Analyst and Data Engineer positions at MAANG and other high-paying companies. Whether you are a fresher or an experienced professional with 5 , 8 , or 10 years of experience, this article gives you all the confidence you need to ace your next interview.
Jun 26, 2024 · Relational Database Management System: The data is stored in relations (tables). Example – MySQL. Non-Relational Database Management System: There is no concept of relations, tuples and attributes. Example – MongoDB. Let’s move to the next question in this SQL Interview Questions. Q4.
- Aayushi Johari
- August 10, 2024
- September 8, 2024
2 days ago · Hide Answer. SQL injection is a flaw in a code that allows attackers to take control of back-end processes and access, retrieve, and delete sensitive data stored in databases. This strategy is widely utilized using data-driven apps to get access to sensitive data and execute administrative tasks on databases. 4.
- This is a straightforward question that requires you to give a duration for which you have worked remotely. For example, if you have been working r...
- The interviewer wants to assess the ease with which you can keep in touch and seamlessly work with a remote team. Outline your experience working w...
- The interviewer wants to assess whether you can complete tasks on time without being monitored. Outline your turn-around time for different tasks.
- This question is an extension of the previous question. The interviewer wants to ensure that you are well-organized and can deliver tasks on time....
- The interviewer may want to know what resources you may need to perform your work efficiently. These may include access to specific software. Be su...
- This is an extension of the previous question. Think of a scenario where the lack of a particular resource was a challenge. Maybe you found a free...
- The interviewer wants to know that you are serious about your work and that you won’t be constantly disturbed. Unlike an office, a house may have s...
- The remote developer jobs interview questions are designed to assess the body of work that you have successfully completed in the remote environmen...
- Through the remote programmer jobs interview questions, the interviewer wants to know whether there are sustainable and strong reasons for you to c...
- Outline skills like task-focus, time-management, careful planning, and the ability to shut out distractions. Additionally, you can also talk about...
Jun 25, 2024 · 3. Explain the types of SQL joins. There are four different types of SQL Joins: (Inner) Join: An inner join is used to retrieve the records that have matching values in tables involved in the join. It combines rows from two tables based on a related column and returns only the matching record.
- A database is an organized collection of structured data that can be stored, easily accessed, managed, and retrieved digitally from a remote or loc...
- A database management system or DBMS is system software that can create, retrieve, update, and manage a database. It ensures the consistency of dat...
- SQL stands for Structured Query Language. It is the standard language for RDBMS and is useful in handling organized data with entities or variables...
- Normalization is used to reduce data redundancy and dependency by organizing fields and tables in databases. It involves constructing tables and se...
- Denormalization is the opposite of normalization; redundant data is added to speed up complex queries that have multiple tables that need to be joi...
- JOINS in SQL is used to combine rows from two or more tables based on a related column between them. Various types of JOINS can be used to retrieve...
- There are four different types of SQL Joins: (Inner) Join: An inner join is used to retrieve the records that have matching values in tables involv...
- SQL queries are divided into four main categories: Data Definition Language (DDL) DDL queries are made up of SQL commands that can be used to defin...
- The major applications of SQL are listed below: Writing data integration scripts Setting and running analytical queries Retrieving subsets of infor...
- Constraints in SQL are used to specify some sort of rules for processing data and limiting the type of data that can go into a table. Now, let us u...
Jun 23, 2024 · Easy SQL Scenario Based Interview Questions. Easy SQL scenario based interview questions will test your ability to apply simple queries and solve basic problems. There will be limited use of subqueries or multiple tables. 1. Write a query to display the highest salaries in each department.
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Jun 18, 2024 · MySQL Interview Questions And Answers for Freshers. 1. What is MySQL and How does it differ from other relational databases? MySQL is an open-source relational database management system (RDBMS) that is widely used for managing structured data. It utilizes SQL (Structured Query Language) for querying and managing data.
