Oracle同义词概念
Oracle同义词Oracle的同义词(synonyms)跟View功能类似,但更强大。在Oracle数据库中的大部分数据库对象,如表、视图、物化视图、序列、函数、存储过程、包、同义词等等都可以做为同义词。其目的主要有2个:用于简化对象访问和提高对象访问的安全性。 下面简单做个演示: SQL> conn scott/tiger Connected. SQL> create table test1 (id number); Table created. SQL> insert into test1 values(1); 1 row created. SQL> commit; 1、创建连接用户: SQL> conn /as sysdba; Connected. SQL> create user zsl identified by zsl; User created. 2、创建profile: SQL> create profile zsl_test1 limitsessions_per_user 5; Profile created.
3、设置profile绑定用户: SQL> alter user zsl profile zsl_test1; User altered.
4、赋予权限 SQL> grant create session to zsl; Grant succeeded. SQL> grant select on scott.test1 to zsl; Grant succeeded. 5、创建同义词 SQL> create synonym zsl.test1 forscott.test1; Synonym created. 6、切换到zsl用户下测试 SQL> conn zsl/zsl Connected. SQL> select * from test1; ID ---------- 1 7、查找属主 SQL> conn /as sysdba; Connected. SQL> set line 150 SQL> select owner,SYNONYM_NAME,TABLE_OWNER,TABLE_NAME from dba_synonyms where SYNONYM_NAME=upper('test1'); OWNER SYNONYM_NAME TABLE_OWNER TABLE_NAME ---------------- ------------------------- ---------------- ------------------- ZSL TEST1 SCOTT TEST1 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |