SQL> CREATE MATERIALIZED VIEW mv_ emp_ pk REFRESH FAST START WITH SYSDATE NEXT SYSDATE+2 WITH PRIMARY KEY AS SELECT* FROM emp@ remote_ db; Materialized view created.是什么意思_SQL> CREATE MATERIALIZED VIEW mv_ emp_ pk REFRESH FAST START WITH SYSDATE NEXT SYSDATE+2 WITH PRIMARY KEY AS SELECT* FROM emp@ remote_ db; Materialized view created.在线翻译_英语_读音_用法_例句