In many Interviews this question is very frequently
asked by the interviewer, that what difference between Stored Procedures and
Functions .So I am explaining some differences
1. Stored
Procedures in database are in compiled Format but Functions compiled at run
time.
2. We can
use DML Statements (insert, update and delete database table) in stored
procedure ,but in functions we cannot use DML Statements
3. Function
can be used with in stored procedures, but stored procedures cannot be used
with in Functions.
4. Functions
can execute with select statements, but stored procedures cant not used with
select statements, for executing procedure exec/execute key word we have to put
before Procedure name.
5. Functions
can used as the column in select Statements, Stored procedure cannot.
6. Functions
can used with WHERE and HAVING ,Stored procedure Cannot be used with Where and
having
7. In
Functions only input parameter we can use, In stored procedure both input and
output parameter can use.
8. Functions
must return a value, but in case of stored procedure they may or not return
value.
9. Functions
can use with join because table valued function return table with can use in
join ,stored procedure can not used with a
join
10. In
Function Table variable can be used temporary table cannot used with functions,
In stored procedure table variable and temporary table both can used.
11. In
function exception handling cannot be done (we cannot use try and catch with in
the functions),Exception handling can be
done with in stored procedure
Examples
1. In
Functions only input parameter we can use, In stored procedure both input and
output parameter can use.
Both input and output parameter can used with stored procedure.
We can not use output parameter in function.
2. DML Statements in Stored procedures and Function
we can use DML statements in stored procedure.
DML statement through error when using in function.
3. Functions
can used as the column in select Statements, Stored procedure cannot.
Function can use with select statement.
Stored procedure can not use with select statement.
4. In
function exception handling cannot be done (we cannot use try and catch with in
the functions),Exception handling can be
done with in stored procedure
In Stored Procedure we can use try catch.
In Function try catch not working.
Autor: Er. Yashodhara Sharma
