从Oracle 9i开始Oracle提供了一个新的系统包DBMS_METADATA,可以用于提取对象创建的DDL语句。
dbms_metadata.get_ddl(table,tab1,user1)
三个参数中,第一个指定导出ddl定义的对象类型(此例中为表类型),第二个是对象名(此例中即表名),第三个是对象所在的用户名。
set heading off;
set echo off;
set pages 999;
set long 90000;
spool dept.sql
select dbms_metadata.get_ddl(table,dept,scott) from dual;
select dbms_metadata.get_ddl(index,dept_idx,scott) from dual;
select dbms_metadata.get_ddl('SEQUENCE', 'DI_SEQ', 'SCOTT') from dual
spool off;
set pagesize 0
set long 90000
set feedback off
set echo off
spool scott_schema.sql
connect scott/tiger;
select dbms_metadata.get_ddl(table,u.table_name)
from user_tables u;
select dbms_metadata.get_ddl(index,u.index_name)
from user_indexes u;
spool off;
connect brucelau /brucelau;
spool procedures.sql
select
dbms_metadata.get_ddl(procedure,u.object_name)
from
user_objects u
where
object_type = procedure;
spool off;
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