Procedure - (MariaDB Advance)

In MariaDB, a procedure is a named block of code that performs a specific task. Procedures are stored in the database and can be called by other programs or scripts. Procedures can be used to simplify complex tasks by breaking them down into smaller, reusable components.

Syntax

The syntax for creating a procedure in MariaDB is as follows:

CREATE PROCEDURE procedure_name (IN parameter_name1 datatype, IN parameter_name2 datatype, ..., OUT output_parameter datatype)
BEGIN
    --body of the procedure
END;

Here, procedure_name is the name of the procedure, parameter_nameN are the names of the input parameters, datatype is the data type of the input parameters, and output_parameter is the name of the output parameter.

Example

Here is an example of a simple procedure that takes two input parameters and returns their sum:

CREATE PROCEDURE add_numbers (IN num1 INT, IN num2 INT, OUT total INT)
BEGIN
    SET total = num1 + num2;
END;

Output

Executing the SQL statement will create a new procedure called add_numbers that takes two integers as input (num1 and num2) and returns their sum in the output parameter total.

Explanation

In the above SQL code, we are creating a new procedure called add_numbers that takes two integers (num1 and num2) as input and returns their sum in the output parameter total. The SET statement is used to assign the sum of num1 and num2 to the output parameter total.

Use

Procedures are useful for simplifying complex tasks by breaking them down into smaller, reusable components. They can also improve performance by reducing the number of database requests needed to perform a task. Procedures can be called from other stored procedures, functions, triggers, or directly from an application or script.

Important Points

• In MariaDB, a procedure is a named block of code that performs a specific task.
• Procedures are stored in the database and can be called by other programs or scripts.
• Procedures can be used to simplify complex tasks by breaking them down into smaller, reusable components.
• Procedures can improve performance by reducing the number of database requests needed to perform a task.

Summary

In summary, a procedure in MariaDB is a named block of code that performs a specific task and can be called by other programs or scripts. Procedures can be used to simplify complex tasks by breaking them down into smaller, reusable components and can improve performance by reducing the number of database requests needed to perform a task. The syntax for creating a procedure in MariaDB includes defining input and output parameters and using a BEGIN...END block to define the procedure's body.