mysql视图功能与用法实例分析

//单表视图
  CREATE [ALGORITHM]={UNDEFINED|MERGE|TEMPTABLE}]
    VIEW 视图名 [(属性清单)]
    AS SELECT 语句
    [WITH [CASCADED|LOCAL] CHECK OPTION];
  //将查询到的结果返回为一个虚拟表，会根据数据库变化而变化
  CREATE VIEW work_view(ID, Name, Addr) AS SELECT id,name,address FROM work;
  //多表上创建视图
  //ALGORITHM=MERGE ALGORITHM有三个参数分别是：merge、TEMPTABLE、UNDEFINED（merge合并表，temptable无法更新信息，undefined）
   CREATE ALGORITHM=MERGE VIEW work_view2(ID,NAME,SALARY) AS SELECT work.id,name,salary FROM work,salary WHERE work.id=salary.id WITH LOCAL CHECK OPTION;