我喜欢存储过程，不知道有多少次我能够使用存储过程对应用程序进行更改，而不会对应用程序产生任何停机时间。

作为Transact SQL的忠实粉丝，调优大型查询已被证明对我非常有用。我已经6年没有写过任何内联SQL了!

我想再投一票赞成使用存储过程(尽管在维护和版本控制时它们会带来麻烦)作为一种限制对底层表的直接访问以获得更好的安全性的方法。

Definitely easier to maintain if you put it in a stored procedure. If there's difficult logic involved that will potentially change in the future it is definitely a good idea to put it in the database when you have multiple clients connecting. For example I'm working on an application right now that has an end user web interface and an administrative desktop application, both of which share a database (obviously) and I'm trying to keep as much logic on the database as possible. This is a perfect example of the DRY principle.

对于Microsoft SQL Server，您应该尽可能使用存储过程来帮助执行计划缓存和重用。为什么要优化计划重用?因为生成执行计划的成本相当高。

Although the caching and reuse of execution plans for ad-hoc queries has improved significantly in later editions of SQL server (especially 2005 and 2008) there are still far fewer issues with plan reuse when dealing with stored procedures than there are for ad-hoc queries. For example, SQL server will only re-use an execution plan if the plan text matches exactly - right down to comments and white space, for example, if each of the following lines of SQL were to be executed independently, none of them would use the same execution plan:

SELECT MyColumn FROM MyTable WHERE id = @id
select MyColumn from MyTable WHERE id = @id
SELECT MyColumn  FROM MyTable WHERE id = @id
SELECT MyColumn FROM MyTable WHERE id = @id -- "some comment"
SELECT MyColumn FROM MyTable WHERE id = @id -- "some other comment"

除此之外,如果你不显式地指定类型的参数然后有一个好的机会,SQL Server可能出错,例如如果您执行上面的查询与输入4,然后用@ id查询SQL Server将parametrise SMALLINT(或可能是一个非常小的整数),所以如果你然后执行相同的查询@ id的说4000,SQL Server将parametrise INT,而不会重用相同的缓存。

我认为还有其他一些问题，老实说，大多数问题都可以解决——特别是在SQL Server的后续版本中，但是存储过程通常会提供更多的控制。

@Keith

安全?为什么scprocs会更安全?

存储过程提供了抵御SQL注入攻击的内在保护。

然而，您并没有完全受到保护，因为您仍然可以编写容易受到此类攻击的存储过程(即存储过程中的动态SQL)。

存储过程的优先级，因为: 在系统运行时修复一些生产中与数据相关的问题(这对我来说是第一个) - DB和程序之间清晰的契约定义(清晰的关注点分离) -更好的可移植性到不同的DB供应商(如果写得好，代码更改通常只在SP端)。 -更好地进行性能调优

缺点:WHERE子句在使用条件上有很大的变化，需要高性能。