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所在平台: Udemy |
课程主页: https://www.udemy.com/course/building-and-executing-stored-procedure-in-sql/
课程评论：没有评论
课程名称：在SQL中构建和执行存储过程 概述：存储过程是一种预先准备好的SQL代码，可以保存以便反复使用。如果您有一条SQL查询需要多次重复编写，可以将其保存为存储过程，然后直接调用以执行。存储过程还允许您传递参数，从而根据传递的参数值执行不同的操作。存储过程可以用于检索数据、修改数据和删除数据库表中的数据，因此您无需每次都编写完整的SQL命令来插入、更新或删除SQL数据库中的数据。 使用存储过程的好处： 1. **易于修改**：存储过程中的代码可以轻松修改，无需重启或重新部署应用程序。当业务逻辑需要变化时，您只需使用简单的ALTER PROCEDURE语句修改存储过程，而不必更改应用程序中的代码并重新部署。 2. **减少网络流量**：使用存储过程时，只需传递过程名称，而不是整体T-SQL代码，从而减少了网络流量。 3. **可重用性**：多个用户或多个客户端应用程序可以执行存储过程而无需重新编写代码。 4. **安全性**：存储过程通过消除对表的直接访问来降低风险。同时，您也可以在创建存储过程时对其进行加密，从而使存储过程中的源代码不可见。 课程将深入探讨这些概念，帮助学习者掌握在SQL中构建和执行存储过程的技术，从而提高数据处理的效率与安全性。
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.You can also pass parameters to a stored procedure, so that the stored procedure can act based on the parameter value(s) that is passed.A stored procedure is used to retrieve data, modify data, and delete data in database table. You don't need to write a whole SQL command each time you want to insert, update or delete data in an SQL database.Benefits of using a stored procedureIt can be easily modified: We can easily modify the code inside the stored procedure without the need to restart or deploying the application. For example, If the T-SQL queries are written in the application and if we need to change the logic, we must change the code in the application and re-deploy it. SQL Server Stored procedures eliminate such challenges by storing the code in the database. so, when we want to change the logic inside the procedure we can just do it by simple ALTER PROCEDURE statement.Reduced network traffic: When we use stored procedures instead of writing T-SQL queries at the application level, only the procedure name is passed over the network instead of the whole T-SQL code.Reusable: Stored procedures can be executed by multiple users or multiple client applications without the need of writing the code again.Security: Stored procedures reduce the threat by eliminating direct access to the tables. we can also encrypt the stored procedures while creating them so that source code inside the stored procedure is not visible.
