Oracle 批量生成sys_guid()

select sys_guid() from dual connect by rownum<10

小写

select sys_guid() from dual

select lower(RAWTOHEX(sys_guid())) from dual ;
select sys_guid() from dual connect by rownum<10
lower(RAWTOHEX(sys_guid()))

迁移时把主键默认值设置成   lower(RAWTOHEX(sys_guid())) ，其他列没有的添加新列，迁移完毕删除添加的列，主键回复