Top 10 SQL Server Interview Questions and Answers

Yes, I have experience in SQL Server Database Administration.

• I have worked as a SQL Server Database Administrator for 5 years.

• I am proficient in managing and optimizing SQL Server databases.

• I have experience in performance tuning, backup and recovery...read more

SQL Server offers various numeric data types for storing different types of numerical values.

• SQL Server provides data types like int, bigint, smallint, tinyint for storing whole numbers.

• Numeric data types like decimal and numeric are used for storing...read more

There are 4 types of backups available in SQL Server: Full, Differential, Transaction Log, and File/Filegroup.

• Full backup: It backs up the entire database including all data and objects.

• Differential backup: It backs up only the changes made since the...read more

Recovery model in SQL Server determines how transactions are logged and how the database can be restored.

• There are three recovery models in SQL Server: Simple, Full, and Bulk-Logged.

• Simple recovery model automatically truncates the transaction log an...read more

SQL is a language used to manage databases, while SQL Server is a Microsoft product that includes a database management system.

• SQL is a language used to interact with databases, while SQL Server is a Microsoft product that includes a database managem...read more

Backup in SQL Server is the process of creating a copy of the database to protect against data loss.

• Backups can be full, differential, or transaction log backups.

• Full backups contain all the data in the database.

• Differential backups contain only the ...read more

SSRS stands for SQL Server Reporting Services, a server-based reporting platform that allows creating and managing reports.

• SSRS is a part of Microsoft SQL Server.

• It provides a set of tools to create, deploy, and manage reports.

• Reports can be created ...read more

To load flat file sources into SQL Server, use SSIS to extract, transform, and load data efficiently.

• Create an SSIS package using SQL Server Data Tools (SSDT).

• Use a Flat File Connection Manager to define the source file's format.

• Add a Data Flow Task ...read more

Magic Tables are temporary tables created by SQL Server during DML operations.

• Magic Tables are used to access the data before and after a DML operation.

• They are created automatically by SQL Server and cannot be accessed directly.

• They are useful for a...read more

CTE is a temporary result set that can be referenced within a SELECT, INSERT, UPDATE, or DELETE statement.

• CTE is defined using the WITH keyword followed by a name and a SELECT statement.

• It can be used to simplify complex queries and improve performan...read more

The architecture of SQL Server involves components like storage engine, query processor, and buffer manager.

• SQL Server architecture consists of multiple components such as storage engine, query processor, and buffer manager.

• The storage engine manages...read more

SQL Server performance tuning involves optimizing database design, query optimization, and server configuration.

• Identify and optimize poorly performing queries

• Ensure proper indexing and partitioning

• Monitor server resources and adjust configuration as...read more

Indexing in SQL Server database

• Indexing improves query performance by creating a structure that allows for faster data retrieval

• Clustered and non-clustered indexes are the two types of indexes in SQL Server

• Clustered indexes determine the physical ord...read more

SQL Server installation involves several steps to set up the database management system on a server.

• Download the SQL Server installation file from the official Microsoft website.

• Run the installation file and follow the on-screen instructions to set u...read more

Setting up Always On group involves configuring multiple SQL Server instances for high availability and disaster recovery.

• Configure Windows Failover Cluster

• Install SQL Server on each node

• Enable Always On Availability Groups feature

• Create availability...read more

The SQL Server DBA structure includes roles such as junior DBA, senior DBA, and lead DBA.

• Junior DBA: responsible for basic tasks such as backups and restores

• Senior DBA: responsible for performance tuning and troubleshooting

• Lead DBA: responsible for m...read more