sqlplus copy在不同库db迁移数据

--sqlplus copy可以自一个库到另一个库迁移数据库表对象
SQL> copy
usage: COPY FROM TO

hr/[email protected]:chicago-mktg
: ONE of the keywords: APPEND, CREATE, INSERT or REPLACE --创建,添加,插入，替换表或表的数据

---如不指定目标库,则为当前库，同理如仅指定to则源库为当前库,to指定目标库
SQL> copy from tbl_bck/[email protected] create t_test_copy using select object_id o
bjectid from user_objects;

Array fetch/bind size is 15. (arraysize is 15)
Will commit when done. (copycommit is 0)
Maximum long size is 80. (long is 80)
Table T_TEST_COPY created.

   28 rows selected from [email protected].
   28 rows inserted into T_TEST_COPY.
   28 rows committed into T_TEST_COPY at DEFAULT HOST connection.

SQL> desc t_test_copy;
Name Null? Type
----------------------------------------- -------- ----------------------------

OBJECTID NUMBER(38)

--与copy性能相关的参数为arraysize,copycommit,long
SQL> copy from tbl_bck/[email protected] create t_test_copy_2 using select object_id
objectid from user_objects;

Array fetch/bind size is 5000. (arraysize is 5000)
Will commit after every 10 array binds. (copycommit is 10)
Maximum long size is 80. (long is 80)
Table T_TEST_COPY_2 created.

   30 rows selected from [email protected].
   30 rows inserted into T_TEST_COPY_2.
   30 rows committed into T_TEST_COPY_2 at DEFAULT HOST connection.

SQL>

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