SQL Server Interview Questions

SQL Server Interview Questions: SQL Server is a popular relational database management system developed by Microsoft. Organizations of all sizes widely use it to manage and store their data. Given its widespread use, many companies are seeking professionals who are well-versed in using SQL Server to manage their databases. As a result, interviewers often ask candidates questions related to SQL Server’s functionalities and best practices.

This article provides an overview of common SQL Server interview questions that candidates may encounter during a job interview. By familiarizing themselves with these questions and their answers, candidates can prepare themselves to demonstrate their expertise in SQL Server and increase their chances of securing a job offer.

SQL Server Interview Questions For Experience

Some of the most commonly asked SQL Server interview questions for experienced professionals include database design and modeling, query optimization, stored procedures and functions, indexing, security and permissions, and disaster recovery planning. Interviewers often look for a deep understanding of SQL Server’s functionalities and the ability to troubleshoot issues that may arise in a production environment.

• The latest entry in the table?
• Display the max of avg salary from each dept?
• How to update all columns at a time?
• How to find files in the directory/subdirectory and the first 5 records in Unix?
• How to kill the process?
• How to know how many members & login into your system in UNIX?
• How to see hidden files in UNIX?
• How to know the background/foreground process in Unix?
• My table has 100 rows then I want to find out 3 to 7 rows only?
• How do find out no of columns in the partial table?

SQL Server Interview Questions For 5 Years Experience

The concept of SQL is one of the most important concepts in databases. It provides a standardized interface that allows developers to work with the data stored in a database, using SQL statements. As part of the interview process, you must demonstrate your knowledge of this topic. Here are some examples of common questions that you may be asked about SQL and how to prepare for them.

• Tell me about your project architecture and roles and responsibilities in your project?
• What is the difference between union all and full outer join?
• What is meant by cross join give an example?
• What is meant by a complex subquery?
• Job salesman clerk salesman: write a query to display the name which contains two „s‟ without using like?
• My project tables have more than 5000000 records then how can u do validations without using sample testing?
• Explain set operators with an example?
• In my project we are having more than 5000 tables, data is loaded into the tables by using an Informatica tool, but due to some wrong connections data is not loaded in some tables. How do you display the tables in which data is not loaded?
• What are the requirements you have for your project?
• Write grep command with an example?
• How do you count the number of files in a Unix?
• Diff between substr and instr?
• Diff between the primary key and the surrogate key?
• How do you join dim and fact tables explain with an example?
• Explain about scd1, scd2, scd3?
• Explain normalization with an example?
• How do you get the data from the client-side either weekly or monthly basics?
• emp dept empno sal deptno deptno dname loc
• write a query to display max sal
• where deptno=10 and loc= Chicago and dname=sales

SQL Server Interview Questions For 7 Years Experience

• What are union and union all? a- table: 1 to 50 records b table: 1 to 50 records and another 50 records if you use union and union all that is the output?
• Take as the example above two tables I want to perform minus and minus all that is the output?
• Take the above tables by using all joins? What is the output?
• A table: Mahesh pati and b table: Mahesh if I write the like select col from a minus select col from b what is the output?
• Select * from emp where eid=null? Is it working?
• Given the table a table having data like 1 2 3 ? 5? I want to insert a null string instead of the “?‟ symbol?
• Similar to the above table provides “_‟ spaces?
• ename sal a 1k b 2k c 3k d 4k I want to find out highest salary and don‟t user subquery, rank By using row numbers?
• Table a name Mahesh-sivala Karthik-kumar Rahul-Sharma I want the separate name and initial name I want the separate name and domain name only which having not „@‟ symbol?
• Select a,b,c,d from table group by 1,2,3 what is the o/p?
• Select a,b,c,d from table group by 1,2,3,4 what is the o/p?
• How to compare 10 tables in the staging and data warehouse?
• I want to sort data in descending order? Unix
• If want to find out the first 5 files and the last 5 records in Unix?
• What is the grep command?
• I want to find files in the Unix box? What is the command?
• what is SCD (slowly changing dimensional)?
• How you are moving one file to another file in Unix?
• I want to delete 2nd records without using row num, row id?

Conclusion:

It’s important to gain insight into essential SQL topics, and these interview questions about SQL servers can help. Practicing them before attending your next SQL server interview is highly recommended. If you have any questions or doubts, don’t hesitate to ask and post them in the comments section provided below.