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What are the differences between Stored procedure and function.

Posted By :Ashutosh Jha     Posted Date :August 31, 2014    Points :40   Category :Sql Server 
Below are the main differences between stored procedure and functions-
1.Function has a return type but Stored procedure doesn't have a return type.
2.Stored Procedure supports IN/OUT/IN-OUT Parameters while function supports only IN parameters.
3.Stored procedure can contain all the DML(Select,update,insert,delete) statements but function can contain only select statement.
4.Function can be called from a stored procedure but stored procedure cannot be executed from a function.
5.For Exception Handling, the stored procedure can contain try---catch block but Function doesn't support try---catch block.


You can also find related Interview Question to What are the differences between Stored procedure and function.  below: 

Difference between Function and Stored Procedure?

  
UDF can be used in the SQL statements anywhere in the WHERE/HAVING/SELECT section where as Stored procedures cannot be.
UDFs that return tables can be treated as another rowset. This can be used in JOINs with other tables.
Inline UDF's can be though of as views that take parameters and can be used in JOINs and other Rowset operations.
(More...)

What is Difference between Function and Stored Procedure?

  
UDF can be used in the SQL statements anywhere in the WHERE/HAVING/SELECT section where as Stored procedures cannot be. UDFs that return tables can be treated as another rowset. This can be used in JOINs with other tables. Inline UDF's can be thought of as views that take parameters and can be used in JOINs and other Rowset operations. (More...)

Database: Difference between Function and stored procedure?

  

Function can be used in sql statements anywhere in where/select/having etc. where as stored procedure cannot be.
(More...)

Difference between stored procedure and function

  

1.Function must return a value but Stored Procedure can return 0(Zero) or n values
2.Functions have only input parameters but Procedures can have either input or output or both parameters .
3.Function must have one input parameter which is mandatory but 4.Stored Procedure may take 0 (Zero) to n input parameters.
5.Functions can be called from Procedure whereas Procedures cannot be called from Function.
6.Procedure contains DML statement whereas function allows only select statement.
6.Exception handling can be done in stored Procedure only (More...)

What is the difference between stored procedure and function.

  
Below is main differences between two.
1) Procedure can return zero or n values whereas function can return one value which is mandatory.
2) Procedures can have input, output parameters for it whereas functions can have only input parameters.
3) Procedure allows select as well as DML statement in it whereas function allows only select statement in it.
4) Functions can be called from procedure whereas procedures cannot be called from function.
5) Exception can be handled by try-catch block in a procedure whereas try-catch block cannot be used in a function.
6) We can go for transaction management in procedure whereas we can't go in function.
7) Procedures cannot be utilized in a select statement whereas function can be embedded in a select statement. (More...)

What is a Stored Procedure?

  
Its nothing but a set of T-SQL statements combined to perform a single task of several tasks. Its basically like a Macro so when you invoke the Stored procedure, you actually run a set of statements. (More...)

What are the differences among batches, stored procedures, and triggers?

  

Batch:
------
A batch is a group of one or more SQL statements. SQL Server compiles the statements of a batch into a single executable unit, called an execution plan. The statements in the execution plan are then executed one at a time.

stored procedure :
------------------
A stored procedure is a group of SQL statements that is compiled one time and can then be executed many times.

trigger:
--------
A trigger is a special type of stored procedure that is not called directly. Trigger is fired each time row is affected by Insert, Update or Delete command.


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How to deal with return value of stored procedure when you are using DataReader ?

  
To deal with such scenario, you can find "ParameterDirection.ReturnValue" in .net
You can use this parameter direction to read the return value of the stored procedure.

Following example can make it more clearer.
In case, you have following or similar type of return statement somewhere in your stored procedure.
Return -999
To read this value, following code works,

Dim result As Integer = 0
Dim retValParam As New SqlClient.SqlParameter("@RETURN_VALUE", SqlDbType.Int)
retValParam.Direction = ParameterDirection.ReturnValue
dbCommand.Parameters.Add(retValParam)
database.ExecuteNonQuery(dbCommand)
result = retValParam.Value ' here the result must contain the returned value. In this case, it will be -999 (More...)

What is the difference between "dynamic SQL" and "stored procedure" ?

  
Dynamic sql is the bunch of statements that dynamically constructed at run time and not stored in database.
Where as Stored procedures are stored in data base in complied form. (More...)

whats the difference between a stroed procedure and a user defined function

  
udf ll return only one output parameter where as sp returns more(2100 not sure)

udf are called directly by their name in a pgm where as exec spname
is used to execcute an sp (More...)

what is the use of sp_who System Stored procedure In Sql Server?

  
Provides information about current Microsoft® SQL ServerT users and processes (More...)

differences between stored procedures and functions:

  
Functions
----------
1) can be used with Select statement
2) Not returning output parameter but returns Table variables
3) You can join UDF
4) Cannot be used to change server configuration
5) Cannot be used with XML FOR clause
6) Cannot have transaction within function

Stored Procedure
-----------------
1) have to use EXEC or EXECUTE
2) return output parameter
3) can create table but won't return Table Variables
4) you can not join SP
5) can be used to change server configuration
6) can be used with XML FOR Clause
7) can have transaction within SP (More...)

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