oracle跨服务器复制表

CREATE PUBLIC DATABASE LINK linktest CONNECT TO som IDENTIFIED BY som USING '(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.38.95.230)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME =testdb)
)
)'


insert into dm_fielddict (Fieldname,Fieldtype,Fieldlen,Numfloat)
SELECT Fieldname,Fieldtype,Fieldlen,Numfloat FROM dm_fielddict@linktest