1、創(chuàng)建一個表t2,使之具有t1表的結(jié)構(gòu) create table t2 as select * from t1 where 1<>2; 2、創(chuàng)建一個表t2,使之具有t1表的結(jié)構(gòu)和數(shù)據(jù) create table t2 as select * from t1; 3、修改michael用戶的確省表空間為users,臨時表空間為temp,并給他在users表空間中創(chuàng)建15m的空間配額 alter user michael default tablespace users temporary tablespace temp quota 15m on users;