It’s often used if you need to use the result of one query as an input into another query. This subquery can be in many places, such as in the FROM clause, the SELECT clause, or a WHERE clause. INTERSECT will display the records that appear in both query1 and query2. Union allows you to combine two sets of results into one result. ROWNUM is a pseudocolumn and has no parameters, where as ROW_NUMBER is an analytical function that takes parameters.

• A temp table (or temporary table) is a database table that exists temporarily on the system.
• If the set of data inside the NOT IN subquery contains any values that have a NULL value, then the outer query returns no rows.
• You create a view by specifying a SELECT query to be used as the view, and then the view can be queried just like a table.
• Especially programming interviews, where you may have to write some code (such as SQL) during the interview.
• In contrast, my NoSQL experience revolves around MongoDB and Cassandra.

Mindmajix offers Advanced SQL Server DBA Interview Questions 2024 that helps you in cracking your interview & acquire a dream career as an SQL Server DBA Developer. It is important to be aware of these risks so that you can take steps to mitigate them. For example, you can use input validation to prevent SQL injection attacks, and you can encrypt sensitive data to prevent unauthorized access and data leakage. Keeping the database up to date with the latest patches and service packs. Make a business case for diversity and inclusion initiatives with this data.

Q. How would you monitor the health and performance of Replication?

That is, in SQL Server 2005, the Installation process itself installs on all of the nodes (be it 2 nodes or 3 nodes). In 2008 or above this has changed, we would need to install separately on all the nodes. 2 times if it is a 2 node cluster or 3 times in a 3 node cluster, and so on. Primarily, the recovery model is chosen keeping in view the amount of data loss one can afford. If one expects to have minimal or no data loss, choosing the Full recovery model is a good choice.

For disaster recovery, I’ve designed strategies using log shipping and database mirroring to maintain copies of the production database on standby servers. My responsibilities also included optimizing performance, managing security protocols, and troubleshooting any issues that arose. I’m well-versed in SQL queries and have a deep understanding of relational database concepts. The rapidly evolving technology landscape has seen a shift toward cloud-based systems. As a Senior Database Administrator, your ability to navigate and manage these platforms is critical. This gives them an idea of your adaptability to new technology trends and your ability to keep their systems updated and efficient.

What is MySQL? – An Introduction To Database Management Systems

This process can be done during non-peak hours to minimize the impact on users. I’d start by ensuring that the current system is fully backed up and tested to prevent data loss. Then, I would set up a parallel environment with the upgraded database for testing purposes. If not, there may be other options like point-in-time recovery, depending on the database technology used. Moreover, I leveraged SSIS in migrating data between different servers and platforms. It was instrumental in performing updates on large datasets efficiently, thereby enhancing performance.

The answer would be depending on the versions you have worked on, I would say I have experience working in SQL Server 7, SQL Server 2000, 2005, and 2008. If you have worked only on some versions be honest in saying that, remember, no one would be working on all versions, it varies from individual to individual. Notice that the inner query relates to the outer query on the employee ID, thus making it a correlated sub-query. The inner query will be evaluated once per the outer query row. So, You still have the opportunity to move ahead in your career in SQL Server DBA.

What are the different ways you can create Databases in SQL Server?

The value will be added to all new records when no other value is provided. For more details please refer to the SQL | Default Constraint article. One of the candidate keys is selected as the most important and becomes the primary key. In this article, we cover 70+ SQL Interview Questions with answers asked in SQL developer interviews at MAANG and other high-paying companies.

• First, SSRS is a tool that is used to create and manage reports for SQL Server databases.
• We do not have conditional statements in SQL like for loops or if..else, we only have commands which we can use to query, update, delete, etc. data in the database.
• By asking this question, the interviewer wants to see your ability to manage these changes without causing disruption to the system, ensuring data integrity, and minimizing downtime.
• Apart from this SQL Interview Questions Blog, if you want to get trained from professionals on SQL, you can opt for a structured training from edureka!
• All reads and writes operations are performed at a page level so we can say actual data is stored in SQL Server on Pages (which are 8KB in size) inside these data files.

Using Rebuildm.exe which is present (Programfiles/microsoft/tools/BINN). Please share this article and let us know your feedback in the comment section. They will be there on previous primary replica and
you can use them for your requirements. Using Cluster Administrator, connect to the cluster and select the SQL Server cluster. In the left pane of the tool, I would select SQL Server Services, the right side pane displays all of the SQL Server Services/components that are installed on that machine. If the Service is displayed as (MSSQLSERVER), then it indicates it is a default instance, else there will be the Instance name displayed.

Stored procedures are pre-compiled SQL statements that repeatedly perform a set of actions. Unlike functions, stored procedures don’t need a parameter, don’t have to return a result, and can modify database objects. A view is a stored query that results in a virtual table containing rows and columns of data.

• This SQL interview question should be relevant to all database management systems.
• SQL databases have a specified schema and employ structured query language.
• As a Senior Database Administrator, you’ll be responsible for managing and safeguarding this critical asset.
• This collection of interview questions on SQL has been collated from my experience with SQL and from various websites.
• Since it filters groups, aggregate functions are allowed in this clause.

It is also the collection of schemas, tables, queries, views, etc. Databases help us with easily storing, accessing, and manipulating data held on a computer. The Database Management System allows a user to interact with the database. It is a language used to interact with the database, i.e to create a database, to how to become a sql dba developer create a table in the database, to retrieve data or update a table in the database, etc. SQL is an ANSI(American National Standards Institute) standard. For example – we can execute queries, we can insert records into a table, can update records, can create a database, can create a table, can delete a table, etc.