![]() ![]() Plane_length DECIMAL ( 5, 2 ) NOT NULL ,ĬONSTRAINT fk_manufacturer_id FOREIGN KEY ( manufacturer_id ) Plane_id INT UNSIGNED NOT NULL AUTO_INCREMENT , Manufacturer_id INT UNSIGNED NOT NULL AUTO_INCREMENT ,Ĭreate_date TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ,ĭEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP , If it is not, you can use the following SQL script to create the database and its tables: If you tried the examples in the previous article, the travel database might still be installed on This article uses the same tables and data to demonstrate how to work with stored procedures. The examples in this article are based on the travel database, which is the same database I used for the previous article on MySQL views. As with the previous articles in this series, I used the MySQL Community edition on a Windows computer to build the examples, which I created in MySQL Workbench, the graphical user interface (GUI) that comes with the CommunityĮdition. ![]() You’ll learn how to build both basic and parameterized procedures that use input and output parameters. ![]() In this article, I demonstrate how to create and update stored procedures, as well as invoke them with a CALL statement. Stored procedures can also deliver a higher degree of security by abstracting the underlying database structure and eliminating ad The ability to reuse code also reduces network traffic because a stored procedure can be invoked with a single CALL statement, no matter how complex the underlying query. Developers don’t have to write complex queries for each application request, and QA teams don’t need to spend as much time verifying queries when testing applications. ![]() Stored procedures enable SQL code to be reused as often as needed, helping to simplify application development and reduce MySQL stored procedures also support the use of input and output parameters, making them a highly flexible tool for encapsulating statement logic. When an application calls the stored procedure, MySQLĮxecutes those statements and returns the results to the application.Ī procedure’s routine can include a wide range of statements, including data definition language (DDL) and data manipulation language (DML). Each stored procedure is a named database object that contains a routine made up of one or more SQL statements. Like most relational database management systems, MySQL supports the use of stored procedures that can be invoked on-demand by data-driven applications.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |