Top 45 SQL Server Interview Questions 2023

The DDPR contains exceptions that mostly focus on questions of public interest . Individuals are entitled to a copy of the personal data in question, which doesn’t necessarily depend if someone is an employer, worker, or self-employed. Troubleshooting is a regular task for a most DBA, so it’s crucial to hire one that is able to do it efficiently.

Notice that the inner how to become a sql server dba relates to the outer query on the employee ID, thus making it a correlated sub-query. The inner query will be evaluated once per outer query row. If you’re a large organization, this question is perfect for you. One thing is working for a small business that has a small data center.

SQL-DBA Interview questions part-1 by Skil App

Fill Factor is a setting that is applicable to Indexes in SQL Server. The fill factor value determines how much data is written to an index page when it is created/rebuilt. Your role and responsibilities carried out in your earlier projects would be of significance to the potential employer. This is the answer that lets the interviewer know how suitable are you for the position to which you are being interviewed.

Definitions of these types of constraints are given when the table is created. Click on the Set Primary Key toolbar button to set the StudId column as the primary key column. PL/SQL is a procedural language developed by Oracle to work with the Oracle database using procedures in SQL. PL/SQL program units are compiled by the Oracle Database server and stored inside the database. And at run-time, both PL/SQL and SQL run within the same server process, bringing optimal efficiency.

Q5. Write a query to fetch only the place name(string before brackets) from the Address column of EmployeeInfo table.

If we choose a longer key, then encryption will be better. Hence, we need to choose longer keys for more encryption. However, there is a larger performance penalty for longer keys.DES is a relatively old and weaker algorithm thanAES . In the SHRINKFILE command, SQL Server isn’t careful about where it puts the pages that are moved from the end of the file toward the beginning of the file. Needs to review the security of your connection before proceeding.

• DML triggers evaluate data before it has been committed to the database.
• If GROUP BY is not used, HAVING works like a WHERE clause.
• Production, information conversion, technical fields, communication, etc. are a few industries making use of SQL Server Admin skills.

Services usually provide core operating system features, such as Web serving, event logging, or file serving. Services can run without showing a user interface on the computer desktop.

What are database normalization forms?

The query which returns only one row is Single row subquery. Deleted when the connection that created it is closed. “DENSE_RANK” – Used to returns a new row number for each distinct row in the result set and it will not leave any number gap in case of duplicates. “RANK” – Used to returns a new row number for each distinct row in the result set and it will leave a number gap in case of duplicates. Union operator is used to combining all the results or records of the table and it removes the duplicate values.

A https://remotemode.net/ Constraint is a rule that identifies valid values for columns of data. If the condition in a Check Constraint is not satisfied,d prevents the value from entering the database. Or, you can create a database using the SQL Server Management Studio. Then, Right-click on Databases, select New Database and follow the wizard steps. You can create a new database using the CREATE DATABASE SQL command.

Which SQL server table is used to hold the stored procedure scripts?

A Full Join takes the matching columns plus all table rows from the left table that does not match the right and all table rows in the request that does not match the left. It applies null for unmatched rows on the other end when doing so. The following example shows the full join between Table_A and Table_C. There are three types of joins available based on the way we join columns of two different tables.

• Write a query to fetch all employees who also hold the managerial position.
• Accessing is faster in the value type on comparison to reference type.
• Write a query to fetch the EmpFname from the EmployeeInfo table in upper case and use the ALIAS name as EmpName.