Differences between Functions and Stored Procedures in SQL Server

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Q

What Are the Differences between User Defined Functions and Stored Procedures in SQL Server Transact-SQL?

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A

Differences between user defined functions and stored procedures are:

Stored procedures does not return any data and they can not be used in expressions.
User defined functions does return data and they can be used in expressions.
Stored procedures only takes data constants as input parameters.
User defined functions can take data constants and expressions as input parameters.
Stored procedures support output parameters.
User defined functions do not support output parameters.
Stored procedures take a parameter's default value, if it is not specified in the calling statement.
User defined functions take a parameter's default value, if it is specified with the keyword DEFAULT in the calling statement.
Stored procedures are called with no parenthesis to include parameters.
User defined functions are called with parenthesis to include parameters. Empty parenthesis is needed if no parameters.
Stored procedures can be created locally and temporarily.
User defined functions can not be created locally and temporarily.

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