2012年7月21日
数据库语言分类
摘要： DDL Data Definition Language (DDL) statements are used to define the database structure or schema. Some examples: CREATE - to create objects in the database ALTER - alters the structure of the database DROP - delete objects from the database TRUNCATE - remove all records from a table, including... 阅读全文
posted @ 2012-07-21 01:53 浮云哥哥 阅读(296) 评论(0) 推荐(0)