Oracle中获取TABLE的DDL语句的方法

获取表的DDL的方法

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

1、利用 DBMS_METADATA.GET_DDL，获取表的 DDL 语句

方法1：

SQL PLUS中执行：

首先运行set echo offset heading offset feedback offset verify offset pagesize 0set linesize 132define schema=&1输入schema的名字然后执行：define CR=chr(10)define TAB=chr(9)col x noprintcol y noprintSELECT TABLE_NAME Y      ,0 X      ,'CREATE TABLE ' || RTRIM(TABLE_NAME) || '('FROM   DBA_TABLESWHERE  OWNER = UPPER('&schema')UNIONSELECT 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     OWHERE  O.OWNER = TC.OWNER       AND O.OBJECT_NAME = TC.TABLE_NAME       AND O.OBJECT_TYPE = 'TABLE'       AND O.OWNER = UPPER('&schema')UNIONSELECT 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 || &CRFROM   DBA_TABLESWHERE  OWNER = UPPER('&schema')ORDER  BY 1         ,2;

方法2：

set pagesize 0set long 90000set feedback offset echo offspool table_ddl.sqlselect 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;

2、imp.indexfile

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;

3、impdp.sqlfile

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;