下列哪条语句含义为检查Oracle在线日志状态（）。 A: selectgroup#,status,type,memberfromv$logfile; B: selectinstance_name,host_name,startup_time,status,database_statusfromv$instance; C: selecttablespace_name,statusfromdba_tablespaces; D: selectname,statusfromv$datafile;

The core of the database system is ____. A: database B: database<br/>application system C: database<br/>management system D: database<br/>administrator

A tabular database ,a distributed database and an object-oriented database are different databases.

The core of the database system is（）. A: Data model B: Database administrator C: Database D: Database management system

删除数据库使用（ ）语句。 A: alter database B: drop database C: delete database D: erase database

删除数据库的命令为（） A: Create database B: use database C: alter database D: drop database

删除数据库的命令是（）。 A: remove database B: drop database C: delete database D: clear database

删除数据库的SQL语句是—— A: DELETE DATABASE B: DROP DATABASE C: REMOVE DATABASE D: DESTROY DATABASE

​删除数据库的SQL语句是‏ A: DELETE DATABASE B: DROP DATABASE C: REMOVE DATABASE D: DESTROY DATABASE

下面属于数据库修改的命令是。（ ） A: edit database B: modify database C: update database D: alter database