1.创建视图
CREATE VIEW v1 AS SELECT * FROM t_user
ALTER VIEW v1 AS SELECT * FROM t_book
类似创建表
CREATE TABLE t_user7 AS SELECT * FROM t_user /*目标表结构不存在情况下,复制数据*/
2.插入、更新数据(最终会转换成对表进行操作)
INSERT INTO v1 VALUES(NULL,'java',120,'feng',1)
UPDATE v1 SET bookname='java2'
3.删除视图(只是删除视图定义,并不删除表中数据)
DROP VIEW IF EXISTS v1