Microsoft SQL Server Database Quiz Questions

A scalar function returns a single value of a specific type.

Table-valued functions return a table data type that can contain multiple rows and columns.

A deterministic function returns the same result every time it is called with a particular set of input values.

SQL Server supports user-defined functions that allow the creation of custom functions.

Functions can be used in the WHERE clause to filter data.

A table-valued function can be treated as a regular table in SELECT statements, allowing joins and other operations.

User-defined functions can return a single value (scalar) or a table (table-valued).

User-defined functions can complement built-in functions but cannot replace them.

Functions in SQL Server can include SELECT statements but cannot perform data modification operations like INSERT, UPDATE, and DELETE.

The RETURN statement is used to exit a function and return a value in SQL Server.

Inline table-valued functions are often more efficient because they are simpler and can be optimized by the SQL Server query optimizer.

Scalar functions can be used to define computed columns in SQL Server tables.

A function in SQL Server can call another function within its definition.

Functions can be used in the ORDER BY clause to sort query results.

Table-valued functions can return complex data structures like multiple rows and columns.

A scalar function returns a single value.

The CREATE FUNCTION keyword is used to define a scalar function.

Scalar functions return a single value, whereas table-valued functions return a table.

Inline table-valued functions are defined using a single SELECT statement and do not include BEGIN...END blocks.

The RETURNS clause specifies the data type or table structure that the function will return.

Table-valued functions return a result set that can be joined with other tables in SQL queries.

The valid types of user-defined functions in SQL Server are scalar functions and table-valued functions.

Inline table-valued functions are defined by a single SELECT statement, while multi-statement functions use multiple statements and BEGIN...END blocks.

The RETURNS clause is used to specify the return type of a scalar function.

The GETDATE() function is a built-in scalar function in SQL Server.

BEGIN...END blocks are used to define multiple SQL statements within the function body.

Deterministic functions always return the same result for the same input values.

Functions in SQL Server cannot modify database state; this is the role of stored procedures.

User-defined functions can encapsulate reusable logic, leading to cleaner and more maintainable code.

Table-valued functions can return complex data structures and be used in joins with other tables.

Scalar functions return a single value, can be used in SELECT clauses, and can be used in computed columns.

Table-valued functions can return multiple rows and columns, be used in joins, and encapsulate complex queries.

Deterministic functions always return the same result for the same input and can be used in indexed views.

Inline table-valued functions use a single SELECT statement, while multi-statement table-valued functions can contain multiple statements and BEGIN...END blocks.

Functions can be used to encapsulate reusable logic, perform calculations, and return data sets.

Table-valued functions return result sets that can be joined with other tables.

Multi-statement table-valued functions can include multiple SQL statements and BEGIN...END blocks, and they can be used for more complex logic.

User-defined functions can return a single value or a table, encapsulate logic, and can be used in SELECT statements.

The valid types of functions in SQL Server are scalar functions and table-valued functions (both inline and multi-statement).

Built-in scalar functions return a single value and can be used in various SQL operations.

Table-valued functions can be used to return complex data sets, perform joins, and encapsulate complex queries.

Deterministic functions return the same result for the same inputs and can be used in indexed views.

Scalar functions can be defined using the CREATE FUNCTION statement.

Table-valued functions can be defined using the CREATE FUNCTION statement with a RETURN clause for the table structure.

User-defined functions can encapsulate logic, return a value or table, and be used in various SQL operations.