在获取表的DDL的时候，可以使用多种方法进行获取：
1、利用 DBMS_METADATA.GET_DDL，获取表的 DDL 语句
2、imp.indexfile
3、impdp.sqlfile
方法1：
SQL PLUS中执行：
计算
安全
数据库
网络和加速
企业服务
首先运行
set echo off
set heading off
set feedback off
set verify off
set pagesize 0
set linesize 132
define schema=&1
输入schema的名字
然后执行：
define CR=chr(10)
define TAB=chr(9)
col x noprint
col y noprint
SELECT TABLE_NAME Y
,0 X
,'CREATE TABLE ' || RTRIM(TABLE_NAME) || '('
FROM DBA_TABLES
WHERE OWNER = UPPER('&schema')
UNION
SELECT TC.TABLE_NAME Y
,COLUMN_ID X
,DECODE(COLUMN_ID, 1, ' ', ' ,') || RTRIM(COLUMN_NAME) || &TAB || &TAB ||
RTRIM(DATA_TYPE) ||
RTRIM(DECODE(DATA_TYPE, 'DATE', NULL, 'LONG', NULL, 'NUMBER',
DECODE(TO_CHAR(DATA_PRECISION), NULL, NULL, '('), '(')) ||
RTRIM(DECODE(DATA_TYPE, 'DATE', NULL, 'CHAR', DATA_LENGTH,
'VARCHAR2', DATA_LENGTH, 'NUMBER',
DECODE(TO_CHAR(DATA_PRECISION), NULL, NULL,
TO_CHAR(DATA_PRECISION) || ',' ||
TO_CHAR(DATA_SCALE)), 'LONG', NULL,
'******ERROR')) ||
RTRIM(DECODE(DATA_TYPE, 'DATE', NULL, 'LONG', NULL, 'NUMBER',
DECODE(TO_CHAR(DATA_PRECISION), NULL, NULL, ')'), ')')) || &TAB || &TAB ||
RTRIM(DECODE(NULLABLE, 'N', 'NOT NULL', NULL))
FROM DBA_TAB_COLUMNS TC
,DBA_OBJECTS O
WHERE O.OWNER = TC.OWNER
AND O.OBJECT_NAME = TC.TABLE_NAME
AND O.OBJECT_TYPE = 'TABLE'
AND O.OWNER = UPPER('&schema')
UNION
SELECT TABLE_NAME Y
,999999 X
,')' || &CR || ' STORAGE(' || &CR || ' INITIAL ' || INITIAL_EXTENT || &CR ||
' NEXT ' || NEXT_EXTENT || &CR || ' MINEXTENTS ' || MIN_EXTENTS || &CR ||
' MAXEXTENTS ' || MAX_EXTENTS || &CR || ' PCTINCREASE ' ||
PCT_INCREASE || ')' || &CR || ' INITRANS ' || INI_TRANS || &CR ||
' MAXTRANS ' || MAX_TRANS || &CR || ' PCTFREE ' || PCT_FREE || &CR ||
' PCTUSED ' || PCT_USED || &CR || ' PARALLEL (DEGREE ' ||
RTRIM(DEGREE) || ') ' || &CR || ' TABLESPACE ' ||
RTRIM(TABLESPACE_NAME) || &CR || '/' || &CR || &CR
FROM DBA_TABLES
WHERE OWNER = UPPER('&schema')
ORDER BY 1
,2;方法2：
set pagesize 0
set long 90000
set feedback off
set echo off
spool table_ddl.sql
select dbms_metadata.get_ddl('TABLE','tablename','username') from dual;
select dbms_metadata.get_ddl('VIEW','viewname','username') from dual;
select dbms_metadata.get_ddl('INDEX','indexname','username') from dual;
spool off;1）先导出用户的数据
[oracle@oracle11g ~]$ exp demo/demo file=test.dmp owner=demo log=test.log;
2)从 dump 文件获取这些 DDL 语句
[oracle@oracle11g ~]$ imp demo/demo file=test.dmp fromuser=demo touser=demo indexfile=test.sql;导出用户数据
[oracle@oracle11g ~]$ expdp demo/demo directory=DATA_PUMP_DIR dumpfile=sqlfile.dmp schemas=demo;
获取 DDL 语句
[oracle@oracle11g ~]$ impdp demo/demo directory=DATA_PUMP_DIR dumpfile=sqlfile.dmp sqlfile=demo.sql;亿速云「云服务器」，即开即用、新一代英特尔至强铂金CPU、三副本存储NVMe SSD云盘，价格低至29元/月。点击查看>>
免责声明：本站发布的内容（图片、视频和文字）以原创、转载和分享为主，文章观点不代表本网站立场，如果涉及侵权请联系站长邮箱：is@yisu.com进行举报，并提供相关证据，一经查实，将立刻删除涉嫌侵权内容。
原文链接：http://blog.itpub.net/31536355/viewspace-2690829/
