What are stored procedures in Oracle?
Stored procedures and functions (subprograms) can be compiled and stored in an Oracle Database XE, ready to be executed. Once compiled, it is a schema object known as a stored procedure or stored function, which can be referenced or called any number of times by multiple applications connected to Oracle Database XE.
What are different types of stored procedures?
Different Types of stored procedure sql Server
- System Defined Stored Procedure. These stored procedures are already defined in SQL Server.
- Extended Procedure. Extended procedures provide an interface to external programs for various maintenance activities.
- User-Defined Stored Procedure.
- CLR Stored Procedure.
What are stored procedures used for?
A stored procedure provides an important layer of security between the user interface and the database. It supports security through data access controls because end users may enter or change data, but do not write procedures.
What are stored procedures explain?
What is a 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.
What is difference between stored procedure and trigger?
Stored procedures can be invoked explicitly by the user. It’s like a java program , it can take some input as a parameter then can do some processing and can return values. On the other hand, trigger is a stored procedure that runs automatically when various events happen (eg update, insert, delete).
Why we use stored procedure in Oracle?
Security. You can restrict access to Oracle data by allowing users to manipulate the data only through stored procedures that execute with their definer’s privileges. For example, you can allow access to a procedure that updates a database table, but deny access to the table itself.
Why we need stored procedure in SQL?
Stored procedues in SQL allows us to create SQL queries to be stored and executed on the server. Stored procedures can also be cached and reused. The main purpose of stored procedures to hide direct SQL queries from the code and improve performance of database operations such as select, update, and delete data.
What is trigger SQL w3schools?
A database trigger is a stored program which is automatically fired or executed when some events occur. A trigger can execute in response to any of the following events: 1. A database manipulation (DML) statement like DELETE, INSERT or UPDATE. 2.
What is cursor in DBMS?
A cursor is a temporary work area created in the system memory when a SQL statement is executed. A cursor contains information on a select statement and the rows of data accessed by it. This temporary work area is used to store the data retrieved from the database, and manipulate this data.