1. Description, definition and update of the data; Ii. Data query; 3. Basic database management methods;

Filename	Size	Update
SQL\一、数据的描述、定义与更新.doc	391168	2018-03-22
SQL\三、基本数据库管理方法.doc	606766	2018-03-22
SQL\二、数据查询.doc	447534	2018-03-22
SQL	0	2018-03-22

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