Advanced SQL interview questions Here are15 advanced SQL interview questions or conceptswithdetailed answers, designed to test in-depth SQL knowledge and problem-solving ability: 1. What are Window Functions? Explain with an example. Answer: Window functionsperform calculations across a set of table ...
WITH CTE AS ( SELECT Name, Salary, ROW_NUMBER() OVER (ORDER BY Salary DESC) AS RN FROM EMPLOYEE ) SELECT Name, Salary FROM CTE WHERE RN = 3; Conclusion: In conclusion, we covered the top 70+ SQL interview questions and answers in this article that help you prepare and crack SQL ...
CREATE UNIQUE CLUSTERED INDEX CLUST_IDX_SQLTIPS ON SQLTips (tip) with (ONLINE=ON) Go; 对表使用联机索引操作时,SQL Server 仍会将用于聚集索引的 SCH-M 锁或用于非聚集索引的共享 (S) 锁置于基础表中,但只适用于在索引操作从开始到结束这一段很短的时间。因此,此选项为在索引创建过程中查询和更新底层...
A SQL Server index is created using the shape of B-Tree structure, that is made up of 8K pages, with each page, in that structure, called an index node. The B-Tree structure provides the SQL Server Engine with a fast way to move through the table rows based on index key, that deci...
black box testing is like testing a vending machine without knowing how it’s built inside. Testers interact with the database without peeking into its inner workings. They focus on checking if the database does what it’s supposed to do, like providing the right answers when asked questions...
SQL Questions & AnswersMonitoring DBAs, Replicating Sprocs, and MoreEdited by Nancy MichellMonitoring DBA ActivitiesQ I have a network administrator who is also a database admin for all the SQL Server™ databases in my enterprise. As such, he has administrative access to the data and data ...
SQL Interview Questions http://career.guru99.com/top-50-sql-question-answers/ 1. What is DBMS? A Database Management System (DBMS) is a program that controls creation, maintenance and use of a database. DBMS can be termed as File Manager that manages data in a database rather than ...
A simple view can be thought of as a subset of a table. It can be used for retrieving data, as well as updating or deleting rows. Rows updated or deleted in the view are updated or deleted in the table the view was created with. It should also be noted that as data in the origin...
19,679 questions with SQL Server-related tags Sort by: Updated Updated Created Answers 0 answers Time out in SQL Hi Im encountering intermittent connection issues with our Azure SQL Database that seem to be related to performance under heavy load. Our application has been running fine for...
Let’s discuss some technical questions and their answers in the below sections now. SQL Server Interview Questions What is the relation between Page and Extent in SQL Server? Pages are basic data storage in SQL Server. The disk space allocated to a data file is logically divided into a sequ...