How to call stored procedure SQL in Oracle

Oracle is a relational database management system that uses stored procedures to enhance its functions. Stored procedures are a collection of pre-compiled SQL statements that accept input parameters, execute specific business logic, and return any number of results. This article will focus on how to call stored procedure SQL in Oracle.

1. Create stored procedure SQL

There are two main ways to create stored procedure SQL in Oracle: through SQL Developer tools and through SQL statements.

1. Through the SQL Developer tool

The SQL Developer tool is a free database development tool provided by Oracle's official website. To create a stored procedure SQL in SQL Developer, follow the following steps:

1.1 Open SQL Developer and enter the connection interface. Connect to the target database.

1.2 Open SQL Worksheet.

1.3 Enter the following SQL statement and execute it: CREATE OR REPLACE PROCEDURE Stored procedure name (parameter 1 data type, parameter 2 data type, ...) IS BEGIN program body; END;

2. Through SQL statements

Creating stored procedure SQL in Oracle can also be done through SQL statements. You can proceed as follows:

2.1 Log in to the database.

2.2 Open SQL Plus.

2.3 Enter the following SQL statement and execute it: CREATE OR REPLACE PROCEDURE Stored procedure name (parameter 1 data type, parameter 2 data type, ...) IS BEGIN program body; END;

2. Call the stored procedure SQL

After building the stored procedure SQL, we need to call it to execute the business logic. The following methods are used to call stored procedure SQL in Oracle:

1. Open the SQL Developer tool, enter the connection interface, and connect to the target database.
2. Open SQL Worksheet.
3. Enter the following SQL statement and execute it: EXEC stored procedure name (parameter 1, parameter 2, ...);

For example:

EXEC P_TEST( 'Hello', 'World');

4. View the result set.

3. Example demonstration

The following is a simple stored procedure SQL example:

CREATE OR REPLACE PROCEDURE P_TEST(msg IN VARCHAR2) IS
BEGIN
DBMS_OUTPUT.PUT_LINE('The message is: '|| msg);
END;

This stored procedure SQL is used to output the incoming message. The method to execute the stored procedure SQL is as follows:

1. Perform steps one and two.
2. Enter the following SQL statement in the SQL Worksheet and execute it: EXEC P_TEST('Hello, Oracle!');
3. View the results in the "Output" tab at the bottom of the SQL Developer tool: The message is: Hello, Oracle!

4. Summary

The calling method of Oracle stored procedure SQL is simple. Execute the business logic in the stored procedure SQL by creating it and calling it through the EXEC command, and view the results in the SQL Developer tool. Stored procedure SQL can greatly improve the processing capabilities of the Oracle database and is suitable for processing multiple rows of data.

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