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- Top 30 Tricky Hive Interview Questions and Answers
- Advanced Query Optimization
- SQL Server Interview Questions for 2-5 Years Experienced [UPDATED 2021]
Top 30 Tricky Hive Interview Questions and Answers
Query optimization is a feature of many relational database management systems and other databases such as graph databases. The query optimizer attempts to determine the most efficient way to execute a given query by considering the possible query plans. Generally, the query optimizer cannot be accessed directly by users: once queries are submitted to the database server, and parsed by the parser, they are then passed to the query optimizer where optimization occurs. However, some database engines allow guiding the query optimizer with hints. A query is a request for information from a database. It can be as simple as "finding the address of a person with Social Security number ," or more complex like "finding the average salary of all the employed married men in California between the ages 30 to 39, that earn less than their spouses. Since database structures are complex, in most cases, and especially for not-very-simple queries, the needed data for a query can be collected from a database by accessing it in different ways, through different data-structures, and in different orders.
Advanced Query Optimization
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(c) Suggest two indexes and an alternate query plan for this query. Solution: Note: many solutions are possible. For purposes of illustation, we assume an.
SQL Server Interview Questions for 2-5 Years Experienced [UPDATED 2021]
Stay updated with latest technology trends Join DataFlair on Telegram!! Hence, that will help you face your Hadoop job interview. Basically, to make candidates familiar with the nature of questions that are likely to be asked on the subject of Hive, These Hive scenario based interview questions and answers are formulated. Moreover, both freshers, as well as experienced candidates, can refer to this blog. So, here are top 30 frequently asked Hive Interview Questions:.