SQL中的视图
原文英文,约300词,阅读约需1分钟。发表于: 。Views in SQL A view in SQL is a virtual table that is created based on the result set of a query. It does not store data itself but dynamically generates data when queried. Views can simplify...
SQL中的视图是基于查询结果的虚拟表,不存储数据,查询时动态生成。视图简化复杂查询、增强安全性、提高数据抽象。特点包括虚拟表、封装查询、限制访问、可重用。创建用`CREATE VIEW`,修改用`ALTER VIEW`,删除用`DROP VIEW`。