Mssql Interview Questions and Answers

MSSql alludes to Microsoft server SQL and is an open-source relational database management system that uses structured query language. This is most common for managing, adding, processing gain access to another database as it is available for everyone hence users can download and access it with the public license. MSSql is mostly known for the offerings with its speed, flexibility, and reliability. It can also be referred to as the SQL server which is formulated to complete the Oracle database or MsSQL.

A subquery is a query that is used by the developers when the expressions are allowed and can be tested inside the actual query for e.g. SELECT, DELETE, UPDATE or INSERT statements.

Its properties are-

• It cannot have any order true clause.
• More than one of it can be included in the main query.
• It has to be placed with parenthesis to get executed in first place.
• It is the main query which has to be placed on the right-hand side of the comparison operator.

MSSQL is one of the most incredible and popular database solutions and it has the largest number of advantages. The strongest in the sequence is its convenience with usability. It comes with various tools that conduct fast and agile development for the database.

Mssql becomes a popular choice in a database management system and its latest features have a lot to offer to the developers.

This is-

• Database engine- It is the core of the main functioning which is used to store and process the data.
• Integration services- It is used for data import and export from a defined database.
• Reporting services- It is used for creating and deploying various types of reports.
• Analysis services- It helps in the analytical processing of the database.

The MSSQL server is highly preferred and considered the best database solution available at present in the SQL industry. The business organizations seeking a secure and easily manageable technique that can even provide a high-performance database management system, MSSql becomes a must-have. It also allows the developers or users to analyze their forecast sales and data protecting the behaviors of their customers using intelligence algorithms.

A trigger is used for executing the batch of MsSQL codes. This is done when commands like INSERT, UPDATE or DELETE are executed against a sequence of the table. Whenever the data gets modified this command automatically gets triggered.

Its types are-

• INSERT
• UPDATE
• INSTEAD OF
• DELETE

Collation is defined to identify, specify the sort order.

There are three types of sort orders which are-

• Binary
• Case sensitive
• Case insensitive

Recursion stored procedure- This procedure is defined as a series of processes for resolving any issue where a solution occurs continuously. This procedure can be nested up to 32 levels. This is a very important MSSQL interview question you can also refer to its details.

Logical operators are used to detecting the truth associated with the condition, some of the operators are-

• ALL- if the entire set of operation is true then it returns the value true
• AND- if the Boolean expressions are true then it returns the value true
• IN- if the operand is equal to the list of expressions then it returns the value true
• ANY- if the set of comparisons are true then it returns the value true
• NOT- it is used to reverse the values of Boolean operators

These commands have a major place in MSSQL interview questions and answers

• Floor- this function is used to round up the values which are non-integer. It is done for the proceeding of least integer values
• Sign- this function is used to determine if the number provided is positive, negative, zero and then returns the value as +1, 0, -1.

SQL server agent has a major role to play in the day to day task management of the SQL server database administration. Its ultimate purpose is to effectively implement the task proteins easily aligned to the scheduler engine which allows them to run for a specific time and date. It also offers two modes of authentication defined in SQL server, these modes are-

• Windows mode
• Mixed mode

If there is a need to change the mode then it can be done from the tool menu of the SQL server configuration properties in the security page section.