- How do you call a function in PL SQL?
- Which is faster query or stored procedure?
- Why do we need triggers?
- Why stored procedure is better than query?
- Are stored procedures outdated?
- Can DML be used in functions?
- What is difference between function and stored procedure?
- Which is better view or stored procedure?
- What are the advantages to use stored procedures?
- Do stored procedures improve performance?
- Can we call a procedure inside a function?
- Why we Cannot call stored procedure?
- Can a SQL function call a stored procedure?
- When should you use stored procedures?
- What is meant by stored procedure?
- How can we optimize stored procedure?
- What are the disadvantages of stored procedures?
- Can a view call a stored procedure?
- Can a stored procedure return a table?
- Can a stored procedure return a value?
- Can we call stored procedure inside stored procedure?
How do you call a function in PL SQL?
You can call a function in various places such as: in an assignment statement: DECLARE l_sales_2017 NUMBER := 0; BEGIN l_sales_2017 := get_total_sales (2017); DBMS_OUTPUT.PUT_LINE(‘Sales 2017: ‘ || l_sales_2017); END; in a Boolean expression.
in an SQL statement..
Which is faster query or stored procedure?
“Stored procedures are precompiled and cached so the performance is much better.” Stored procedures are precompiled and optimised, which means that the query engine can execute them more rapidly. By contrast, queries in code must be parsed, compiled, and optimised at runtime.
Why do we need triggers?
Triggers help the database designer ensure certain actions, such as maintaining an audit file, are completed regardless of which program or user makes changes to the data. … The programs are called triggers since an event, such as adding a record to a table, fires their execution.
Why stored procedure is better than query?
The primary advantage to parameterized queries and stored procedures is that they don’t have to go through the compile process over and over again. Stored procedures also offer some additional security aspects. Ad hoc queries are just query strings passed to the server directly. They are compiled and stored in memory.
Are stored procedures outdated?
IMHO stored procedures are not bad, they can be used for many useful things like triggers, or performing some complicated queries where you would have to write many queries on the client side instead.
Can DML be used in functions?
The answer of this is “No” you cannot write DML statements in SQL functions. Functions have Only READ-ONLY database access. If DML operations would be allowed in functions, then functions would be pretty similar to stored procedures. The way it is, a stored procedure can use a function, but not vice versa.
What is difference between function and stored procedure?
In a function, it is mandatory to use the RETURNS and RETURN arguments, whereas in a stored procedure is not necessary. In few words, a stored procedure is more flexible to write any code that you want, while functions have a rigid structure and functionality.
Which is better view or stored procedure?
In general, a Stored Procedure stands a good chance of being faster than a direct SQL statement because the server does all sorts of optimizations when a stored procedure is saves and executed the first time. A view is essentially a saved SQL statement.
What are the advantages to use stored procedures?
Advantages of Stored ProceduresTo help you build powerful database applications, stored procedures provide several advantages including better performance, higher productivity, ease of use, and increased scalability. … Additionally, stored procedures enable you to take advantage of the computing resources of the server.More items…
Do stored procedures improve performance?
Stored procedures improve database performance as they allow cached query plans to be reused. In the case of dynamic SQL, you will have to use parameterized queries to increase cached query plan reusability.
Can we call a procedure inside a function?
Because it is permitted to call procedure inside the function. … The function might be in scope of the procedure but not vice versa. Your procedure is doing something which is not allowed when we call a function in a query (such as issuing DML) and you are calling your function in a SELECT statement.
Why we Cannot call stored procedure?
You cannot execute a stored procedure inside a function, because a function is not allowed to modify database state, and stored procedures are allowed to modify database state. … User-defined functions cannot be used to perform actions that modify the database state.
Can a SQL function call a stored procedure?
Stored Procedures are. If a function called a stored procedure, the function would become able to have side-effects. So, sorry, but no, you can’t call a stored procedure from a function. Another option, in addition to using OPENQUERY and xp_cmdshell, is to use SQLCLR (SQL Server’s “CLR Integration” feature).
When should you use stored procedures?
Basically when you have to perform operations involving data that do not need to get out of the database. For example, you want to update one table with data from another, it makes little sense to get the data out and then back in if you can do it all in one single shot to the db.
What is meant by stored procedure?
A stored procedure is a prepared SQL code that you can save, so the code can be reused over and over again. So if you have an SQL query that you write over and over again, save it as a stored procedure, and then just call it to execute it.
How can we optimize stored procedure?
SQL Server Stored Procedures Optimization TipsUse stored procedures instead of heavy-duty queries. … Include the SET NOCOUNT ON statement in your stored procedures to stop the message indicating the number of rows affected by a Transact-SQL statement. … Call stored procedures using their fully qualified name.More items…•
What are the disadvantages of stored procedures?
-Disadvantages of the Stored procedure.A large number of Logical operations increase CPU usage.Difficult to Debug.Not easy to Develop and Maintain.Not designed for developing Complex or Flexible business logic.
Can a view call a stored procedure?
Well, you can’t use temp tables in a view (which would totally solve the problem, because temp tables rock). You can do the subqueries-to-temp table stuff in a stored procedure, but you can’t call a stored procedure from a view.
Can a stored procedure return a table?
Every stored procedure can return an integer value known as the execution status value or return code. If you still want a table returned from the SP, you’ll either have to work the record set returned from a SELECT within the SP or tie into an OUTPUT variable that passes an XML datatype.
Can a stored procedure return a value?
Return values can be used within stored procedures to provide the stored procedure execution status to the calling program. You can create your own parameters that can be passed back to the calling program. By default, the successful execution of a stored procedure will return 0.
Can we call stored procedure inside stored procedure?
Here is an example of how to call a stored procedure inside another stored procedure. This is also known as nested stored procedures in SQL Server. Step 1: Create two simple stored procedure to insert some data into two different tables. both accept four parameters to insert the data.