通过本章学习，你能够学会：
在进行SQL Server程序设计时涉及的批处理、事务、局部变量、全局变量的概念及使用方法
在进行SQL Server程序设计时涉及到的程序控制语句的使用方法
在进行SQL Server程序设计时还会用到游标，在本章中还可以学到游标的使用方法
在进行SQL Server程序设计时为使编程简洁清晰还会用到用户自定义函数，在本章将会学到用户如何定义自己的函数(Through this chapter, you can learn:
The concepts and usage of batch, transaction, local variables, global variables involved in the design of SQL Server program
The use of program control statements involved in the design of the SQL Server program
Cursors are also used in the design of SQL Server programs, and in this chapter the use of cursors can also be learned
A user defined function will be used to make programming concise and clear in SQL Server programming, and in this chapter we will learn how users define their own functions)