ORACLE如何使用DBMS_METADATA.GET_DDL获取DDL语句

1.得到一个表的ddl语句：
SET SERVEROUTPUT ON
SET LINESIZE 1000
SET FEEDBACK OFF
set long 999999             ------显示不完整
SET PAGESIZE 1000    ----分页
 
EXECUTE DBMS_METADATA.SET_TRANSFORM_PARAM(DBMS_METADATA.SESSION_TRANSFORM,'STORAGE',false);  ---去除storage等多余参数
 
SELECT DBMS_METADATA.GET_DDL('TABLE','TCC_NE_FRAME') from DUAL;
SELECT DBMS_METADATA.GET_DDL('TABLE','TCC_NE_SNAP') from DUAL;
 
2.得到一个用户下的所有表，索引，存储过程的ddl
 
SET SERVEROUTPUT ON
SET LINESIZE 1000
SET FEEDBACK OFF
set long 999999  ------显示不完整
SET PAGESIZE 1000  ----分页
---去除storage等多余参数
EXECUTE DBMS_METADATA.SET_TRANSFORM_PARAM(DBMS_METADATA.SESSION_TRANSFORM,'STORAGE',false);
 
SELECT DBMS_METADATA.GET_DDL(U.OBJECT_TYPE, u.object_name)
  from USER_OBJECTS u
 where U.OBJECT_TYPE IN ('TABLE','INDEX','PROCEDURE');
 
3.得到所有表空间的ddl语句
 
SET SERVEROUTPUT ON
SET LINESIZE 1000
SET FEEDBACK OFF
set long 999999------显示不完整
SET PAGESIZE 1000----分页
---去除storage等多余参数
 
SELECT DBMS_METADATA.GET_DDL('TABLESPACE', TS.tablespace_name)
from DBA_TABLESPACES TS;
4.得到所有创建用户的ddl
 
SET SERVEROUTPUT ON
SET LINESIZE 1000
SET FEEDBACK OFF
set long 999999------显示不完整
SET PAGESIZE 1000----分页
---去除storage等多余参数
 
SELECT DBMS_METADATA.GET_DDL('USER',U.username)
from DBA_USERS U;