To help, we’ve counted down the top 100+ data engineering interview questions. These questions are from real-life interview experiences, and they cover essential skills for data engineers, including: Behavioral Questions Basic Data Engineering Questions SQL Interview Questions Python Interview Questions...
The import command should be used with the –e and – query options to execute free form SQL queries. When using the –e and –query options with the import command the –target dir value must be specified. 9. Differentiate between Sqoop and distCP. DistCP utility can be used to transfer...
7. What is LINQ in C#? LINQ stands for Language Integrated Query. LINQ is a data querying methodology that provides querying capabilities to .NET languages with a syntax similar to a SQL query. LINQ has a great power of querying on any source of data. The data source could be collections...
SQL Server Profiler is a tool for monitoring and analyzing SQL Server events. It captures and records data about each event, such as query execution, performance metrics, and errors. It allows database administrators to diagnose performance issues, identify slow-running queries, and audit SQL Serve...
Write a SQL query using UNION ALL (not UNION) that uses the WHERE clause to eliminate duplicates. Why might you want to do this? View answer You can avoid duplicates using UNION ALL and still run much faster than UNION DISTINCT (which is actually same as UNION) by running a query like...
The application which comes under the RDBMS category is MySQL, Oracle, Informix, IBM DB2 and Microsoft SQL Server. RDBMS Interview Questions we are mentioning below will help you to gain enough knowledge about RDBMS.Advantages RDBMS is in tabular form which is easy to understand Provide Security ...
Execute your SQL query using the `cursor.execute('YOUR_RAW_SQL_QUERY')` method. Always close the connection after operations to free up resources, especially in production environments. SQLAlchemy offers an Object Relational Mapper (ORM) layer; you can still bypass the ORM and execute raw ...
1 What is a query? 1 What is subquery? 1 What are the types of subquery? 1 How to create a table in SQL? 1 What are tables and Fields? 1 How to delete a table in SQL Server? 1 How to update a database table using SQL? 1 What is a database relationship? 1 What...
5. How do you use Spark SQL to query data from a DataFrame? Intermediate Spark Interview Questions Advanced Spark Interview Questions Spark Coding Interview Questions Final Thoughts Spark Interview FAQs Apache Spark is a unified analytics engine for data engineering, data science, and machine learning...
But you can check what SQL is created in case of the direct query using some SQL tool on the database. !! Power BI 101 Interview questions !! !! Master Microsoft Fabric- 36 Videos !! Microsoft Power BI Learning Resources, 2023 !! Learn Power BI - Full Course with Dec-2022, ...