ORACLE数据库中建立、删除--同义词、视图、索引、序列

select * from emp;
create synonym emp_ny for emp;
create public synonym pub_emp_ny for employees;--建立公有同义词
DROP SYNONYM EMP_NY;--删除同义词

DROP PUBLIC SYNONYM PUB_EMP_NY;--删除公有同义词

查看已有同义词

SELECT * FROM SYS.ALL_SYNONYMS WHERE table_name='DIC_TRIPMODE';

CREATE SEQUENCE SEQID INCREMENT BY 1 START WITH 1001 MAXVALUE 1200 MINVALUE 1 CYCLE NOCACHE ; DROP SEQUENCE SEQID;--删除序列 CREATE VIEW EMP_VE AS SELECT * FROM EMP; CREATE OR REPLACE VIEW EMP_VE AS SELECT * FROM EMP WHERE ADDRESS LIKE '%USA%' --有条件建立视图 CREATE FORCE VIEW EMPLOYEE_VE AS SELECT * FROM ABC;--建立带错误视图，意为即便表不存在也建立 DROP VIEW EMP_VE;--删除视图 CREATE INDEX employees_empid ON EMPLOYEES(DATEOFJOINING);--标准索引 CREATE INDEX employees_empname ON EMPLOYEES(ENAME,JOB);--组合索引 CREATE INDEX emp_ename ON EMP (ENAME) REVERSE;--反向键索引 CREATE BITMAP INDEX emp_bit_address ON EMP(ADDRESS);--位图索引 CREATE INDEX abc_name ON ABC(LOWER(aname)); DROP INDEX employees_empid;--删除索引 CREATE TABLE place ( place_id NUMBER(5)PRIMARY KEY, pName VARCHAR2(20), Address VARCHAR2(20), Station VARCHAR2(10) )ORGANIZATION INDEX; 以上只是一些简单的建立，但从中能够看出ORACLE数据库的功能不知比SQL Server强大多少！真不愧为对象关系型数据库