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alter table tbl_name add col_name type 例如,给表增加一列weight mysql>alter table pet add weight int 删除列 alter table tbl_name drop col_name 例如，删除列weight： mysql>alter table pet drop weight 改变列 alter table tbl_name modify col_name type 例如，改变weight的类型： mysql> alter table pet modify weight samllint 另一种方法是： alter table tbl_name change old_col_name col_name type 例如： mysql> alter table pet change weight weight samllint 给列更名 mysql>alter table pet change weight wei 给表更名 alter table tbl_name rename new_tbl 例如，把pet表更名为animal mysql>alter table pet rename animal -alter table tbl_name add col_name type for example, to form an increase in weight mysql> alter table pet add weight int Remove Columns alter table tbl_name drop col_name For example, the deletion of column weight: mysql> alter table pet drop weight change out alter table tbl_name modify col_name type for example, the type of weight change: mysql> alter table pet modify w

这是利用JavaScript中的session对象来设置的简易购物车-session

练习643D立体字，643D立体字练习，请使用啊事业-practice 643D three-dimensional characters three-dimensional characters 643D practice, please use ah cause

关于R+树的java源码，有兴趣的朋友可以研究下了-On the R+ Tree java source code, are interested can study a Friend

Java的实用文件程序 运用命令行演示通过了调试-Java documentation procedures practical demonstration of the use of command-line through the debug

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贪吃蛇的源码 简单易懂 欢迎大家下载 马士兵写的-Snake" s source code easy to understand are welcome to download Refbacks are written in

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针对出租业务而设计的出租计费系统，此系统完全是基于J2EE的计费系统 -Designed for the rental business rental billing system, this system is fully J2EE-based billing system