在获取表的DDL的时候，可以使用多种方法进行获取：
创新互联建站是一家专业提供建阳企业网站建设,专注与网站建设、成都网站制作、HTML5、小程序制作等业务。10年已为建阳众多企业、政府机构等服务。创新互联专业网站设计公司优惠进行中。
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：
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;
