Oracle中批量导出Sequence

最新推荐文章于 2024-09-07 12:25:53 发布

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本文介绍两种Oracle数据库中序列(sequence)的导出方法。一种是通过构造SQL语句实现序列定义的导出；另一种则是利用Oracle提供的dbms_metadata包获取序列的DDL。这两种方法均可帮助用户准确地获取指定用户的序列定义。

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Java代码

select 'create sequence '||sequence_name||
' minvalue '||min_value||
' maxvalue '||max_value||
' start with '||last_number||
' increment by '||increment_by||
(case when cache_size=0 then ' nocache' else ' cache '||cache_size end) ||';'
from dba_sequences where sequence_owner='HR'

select 'create sequence '||sequence_name||
       ' minvalue '||min_value||
       ' maxvalue '||max_value||
       ' start with '||last_number||
       ' increment by '||increment_by||
       (case when cache_size=0 then ' nocache' else ' cache '||cache_size end) ||';'
from dba_sequences where sequence_owner='HR'

注意：其中的HR，是需要导出sequence的用户，貌似必须大写的说！并且使用该脚本的用户需要有访问dba_sequences的权限。

导出结果如下：

Java代码

create sequence HIBERNATE_SEQUENCE minvalue 1 maxvalue 999999999999999999999999999 start with 1 increment by 1 cache 20;
create sequence MIAGENTVERSION_VERSION_SEQ minvalue 1 maxvalue 999999999999999999999999 start with 121 increment by 1 cache 20;

　　方法二:

　　select dbms_metadata.get_ddl('SEQUENCE',u.object_name) from user_objects u where object_type='SEQUENCE'

　　结果类似:

　　CREATE SEQUENCE "MO_VO"."ARTCOMMENT_SEQ" MINVALUE 1 MAXVALUE 999999999999999999999999999 INCREMENT BY 1 START WITH 341 CACHE 20 ORDER NOCYCLE ;

　　CREATE SEQUENCE "MO_VO"."ARTICLEVISTCECOLLECT_SEQ" MINVALUE 1 MAXVALUE 999999999999999999999999999 INCREMENT BY 1 START WITH 1 CACHE 20 ORDER NOCYCLE ;

　　CREATE SEQUENCE "MO_VO"."ARTICLEVISTTEMP_SEQ" MINVALUE 1 MAXVALUE 999999999999999999999999999 INCREMENT BY 1 START WITH 82989 CACHE 20 ORDER NOCYCLE ;

　　CREATE SEQUENCE "MO_VO"."ARTICLEVIST_SEQ" MINVALUE 1 MAXVALUE 999999999999999999999999999 INCREMENT BY 1 START WITH 1675 CACHE 20 ORDER NOCYCLE ;