This file is about the operations of how to update the data in SQL Server
Almost finished the INSERT statement
Almost finish the DELETE statement
Add how to use SELECT to copy a new table form old one
Finished all about IDENTITY
Almost finished the opertations about how to modify data in SQL Server
FUNCTION
完成FUNCTION的总结
完成创建数据库的整理，简单版，关于创建的详细参数内容可参看MSDN