oracle视图建主键

 sys_guid()  -  唯一索引

在Oracle中可以用SYS_GUID()来生成一个guid,相当于msSql中的newid()。

一个项目要求视图建主键，下面是一个例子：

转：http://blog.csdn.net/myfmyfmyfmyf/article/details/37694731

不好懂，先记着；

CREATE or replace VIEW SME_V_A....  (AGENTID,AGENTNAME,BUSYNUM,RESTNUM,RESTTIME,DEVICENONUM,DEVICENOSUM
       ,CONSTRAINT AGENTSTATIC_PK PRIMARY KEY (AGENTID) RELY DISABLE NOVALIDATE)
 AS
 SELECT A.AGENTID as AGENTID, ---座席编号
       (SELECT B.OPERATOR_NAME
           FROM CC_AGENT_INFO B
          WHERE B.WORK_NO = A.AGENTID) AS AGENTNAME, ----坐席姓名
       NVL(SUM(C.BUSYNUM), 0) AS BUSYNUM, -----示忙次数
       NVL(SUM(C.RESTNUM), 0) AS RESTNUM, ------休息次数
       NVL(SUM(C.RESTTIME), 0) AS RESTTIME, ------休息时长（分钟）
       NVL(D.DEVICENO_NUM, 0) AS DEVICENONUM, -------接话总量
       NVL(D.DEVICENO_SUM, 0) AS DEVICENOSUM-------接话总时长
  FROM CC_V_.....   A
   LEFT JOIN 。。。。。。
  LEFT JOIN 。。。。。。
  GROUP BY A.AGENTID, D.DEVICENO_NUM, D.DEVICENO_SUM;

 查看是否已经存在主键

select a.constraint_name, a.column_name  
  from user_cons_columns a, user_constraints b  
 where a.constraint_name = b.constraint_name  
   and b.constraint_type = 'P'  
   and a.table_name = 'SME_V_A....'