如果要导出DD用户下的所有定义，那么在SQL*Plus中代码如下所示：

SET PAGESIZE 0
SET TRIMSPOOL ON
SET LINESIZE 10000
SET LONG 90000
SET FEEDBACK OFF
SET FEED OFF
SET ECHO OFF
SPOOL /tmp/schema_dd.sql
SELECT CASE
         WHEN U.OBJECT_TYPE IN
              ('PROCEDURE', 'FUNCTION','PACKAGE', 'TRIGGER') THEN
          DBMS_METADATA.GET_DDL(U.OBJECT_TYPE, U.OBJECT_NAME, 'DD') ||
          CHR(10) || '/'
         ELSE
          DBMS_METADATA.GET_DDL(U.OBJECT_TYPE, U.OBJECT_NAME, 'DD')||
          CHR(10) || ';'
       END AS SCOTT_DDL
  FROM USER_OBJECTS U
 WHERE U.OBJECT_TYPE IN
       ('PROCEDURE','FUNCTION','PACKAGE','TRIGGER')
       AND U.OBJECT_NAME not like 'BIN%';
SPOOL OFF;

则可以导出DD用户下所有的DDL语句到/tmp/schema_dd.sql文件中。 找DDL中的关键字
fgrep 999 * | grep -v 999999
fgrep 9999 * | grep -v 999999
fgrep CN30006 * | grep -v CN300006
fgrep CN3000006 * | grep -v CN300006 另外一个更简单的找关键字的方法
select * from dba_source t where OWNER='DD' and upper(text) like '%999%' and upper(text) not like '%999999%';
select * from dba_source t where OWNER='DD' and upper(text) like '%CN30006%' and upper(text) not like '%CN300006%';
select * from dba_source t where OWNER='DD' and upper(text) like '%CN3000006%' and upper(text) not like '%CN300006%';

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