Home Database Mysql Tutorial 通过案例学调优之--跨库建立物化视图(Materialized View)

通过案例学调优之--跨库建立物化视图(Materialized View)

Jun 07, 2016 pm 04:48 PM
oracle Tuning

通过案例学调优之--跨库建立物化视图(MaterializedView)应用环境:操作系统:RedHatEL55Oracle:Oracle10gR2一、物化视图概述Oracle的物化视图是包括一个查询

在建立物化视图的时候可以指定ORDER BY语句,使生成的数据按照一定的顺序进行保存。不过这个语句不会写入物化视图的定义中,而且对以后的刷新也无效。


案例分析: 

wKiom1P2-zWS-2OsAAAk4isaf1I174.png


 本案例架构

1)在test1库上建立db link

tnsnames.ora:

[oracle@rh6 admin]$ cat tnsnames.ora # tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/tnsnames.ora # Generated by Oracle configuration tools. TEST1 =   (DESCRIPTION =     (ADDRESS = (PROTOCOL = TCP)(HOST = rh6.cuug.net)(PORT = 1521))     (CONNECT_DATA =       (SERVER = DEDICATED)       (SERVICE_NAME = test1)     )   ) PROD =   (DESCRIPTION =     (ADDRESS = (PROTOCOL = TCP)(HOST = rh6.cuug.net)(PORT = 1521))     (CONNECT_DATA =       (SERVER = DEDICATED)       (SERVICE_NAME = prod)     )   )在prod库上建立tom用户,并授权 15:18:08 SYS@ prod >create user tom identified by tom; User created. 15:18:27 SYS@ prod >grant connect,resource to tom; Grant succeeded. 15:18:49 SYS@ prod >grant all on scott.emp1 to tom; Grant succeeded. 在test1库上建立db link 15:12:12 SYS@ test1 >grant create database link,create public database link to tom; Grant succeeded. 15:13:59 TOM@ test1 >create database link db_link_prod connect to tom identified by tom using 'prod'; Database link created. 测试: 15:19:10 TOM@ test1 >select * from scott.emp1@db_link_prod;      EMPNO ENAME      JOB              MGR HIREDATE                   SAL       COMM     DEPTNO ---------- ---------- --------- ---------- ------------------- --------       7369 SMITH      CLERK           7902 1980-12-17 00:00:00        800                    20       7499 ALLEN      SALESMAN        7698 1981-02-20 00:00:00       1600        300         30       7521 WARD       SALESMAN        7698 1981-02-22 00:00:00       1250        500         30       7566 JONES      MANAGER         7839 1981-04-02 00:00:00       2975                    20       7654 MARTIN     SALESMAN        7698 1981-09-28 00:00:00       1250       1400         30       7698 BLAKE      MANAGER         7839 1981-05-01 00:00:00       2850                    30       7782 CLARK      MANAGER         7839 1981-06-09 00:00:00       2450                    10       7788 SCOTT      ANALYST         7566 1987-04-19 00:00:00       3000                    20       7839 KING       PRESIDENT            1981-11-17 00:00:00       5000                    10       7844 TURNER     SALESMAN        7698 1981-09-08 00:00:00       1500          0         30       7876 ADAMS      CLERK           7788 1987-05-23 00:00:00       1100                    20       7900 JAMES      CLERK           7698 1981-12-03 00:00:00        950                    30       7902 FORD       ANALYST         7566 1981-12-03 00:00:00       3000                    20       7934 MILLER     CLERK           7782 1982-01-23 00:00:00       1300                    10 14 rows selected.
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