News & Events

It is often used in scenarios where data needs to be synchronized between two or more databases, or where data needs to be made available to multiple databases. The interviewer is also interested in understanding how the DBA would plan and implement an AlwaysOn Availability Group solution. There are many ways to harden SQL Server against security threats, and it is important to know how to do this in order to protect the server and the data it stores. The interviewer wants to know how the DBA would go about solving a real-world problem. Asking about best practices for backing up and restoring SQL Server databases is a way to get at this. The interviewer is likely looking for someone who is familiar with the various tools available for monitoring SQL Server, as well as the importance of monitoring SQL Server.

The following are some of my favorite questions which are designed to test a
DBA’s knowledge, and the answers do not require long T-SQL scripts (ie. 50+
lines). By applying the baselines to the Model system database that acts as a template for all newly created databases. The LEGACY_CARDINALITY_ESTIMATION database level option should be disabled, to set the cardinality estimation model of the database back to the SQL Server 2012. When the Maximum Degree of Parallelism option is set to 1 or the number of logical processors available in the
SQL Server is only one. When provisioning an Azure Virtual Machine to host a SQL Server instance, it comes with two default disks; the OS disk and a Temporary disk that is used to host the Pagefile.sys file.

Q. What do you understand by “Publication” and “Subscription” in SQL Server Replication?

There are various types of join which can be used to retrieve data and it depends on the relationship between tables. There can be many unique constraint defined per table, but only one Primary key constraint defined per table. Apart from this SQL Interview Questions Blog, if you want to get trained from professionals how to become a sql dba developer on SQL, you can opt for a structured training from edureka! These variables are the variables which can be accessed throughout the program. ALIAS command in SQL is the name that can be given to any table or a column. This alias name can be referred in WHERE clause to identify a particular table or a column.

Brent recorded videos helping you prepare and practice for interviews with 100 practice DBA interview questions on on your desktop, laptop, iPad, or iPhone. This is a standard SQL Server DBA interview question asked at technical interviews. The four main types of DBCCs are Information Commands, Validation Commands, Maintenance Commands, and Miscellaneous Commands. Yes, database snapshots can be created of primary or secondary databases if their role state is
either PRIMARY or SECONDARY. Database snapshots cannot be created if the role state is RESOLVING.

What are the differences in Clustering in SQL Server 2005 and 2008 or 2008 R2?

The two servers communicate with each other to keep the databases synchronized. If one server goes down, the other server can take over and keep the database running. Doing regular backups and restores to ensure that the database is healthy and can be recovered in the event of a failure. To ensure that the DBA is familiar with the latest backup and restore technologies and techniques. With the release of SQL Server 2016, there have been significant changes to the backup and restore process.

• This supports faster execution instead of executing multiple queries.
• Aggregate functions are used to evaluate mathematical calculation and return single values.
• It optimizes query performance, durability using AI-powered features.
• We can use
  DBCC CHECKDB WITH ESTIMATEONLY statement to predict the estimated amount of tempdb space before its
  actual execution.
• Demonstrate your fit by aligning your answers with the company’s values and culture.
• Third, SSRS is a tool that can be used to schedule and automate the generation of reports.

Online Transaction Processing (OLTP) manages transaction based applications which can be used for data entry, data retrieval and data processing. Unlike OLAP systems goal of OLTP systems is serving real-time transactions. A nonclustered index does not alter the way it was stored but creates a complete separate object within the table.

What Is Query Store In SQL Server?

Aggregate functions like COUNT, SUM, AVG, MAX, and MIN perform a calculation on a set of values and return a single value. The most common types are INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN. TRUNCATE removes all the rows from the table, and it cannot be rolled back. DROP command removes a table from the database and operation cannot be rolled back.

This tip proposes questions for a technical interview for DBAs. It aims to make
the interview tough, so only candidates who are strong in theory
and hands-on experience will survive. This is because stretching the database to Microsoft Azure does not apply to the tables that have an indexed view or has a column with an XML data type. To set up a user in SQL Server, navigate to user mapping and list all databases where the new account should reside before selecting its role from a drop-down box and clicking OK. As an effective database administrator, you should acquire in-depth knowledge of this complex technology to ensure its smooth functioning within your organisation’s data management systems. Transactional replication is important for SQL Server DBAs because it can help ensure that data is synchronized between databases, and that data is available to multiple databases.