多项选择题
A.when the tablespace is online
B.when the tablespace has segments with data in it
C.when the tablespace is a default permanent tablespace for the database
D.when the tablespace contains a table that is currently being used by transactions
E.when the tablespace contains undo data that is needed to rollback an uncommitted transaction
多项选择题 Which two statements are true regarding the MRKT tablespace（）
多项选择题 You execute the following command to change the status of the SALES tablespace： SQL> ALTER TABLESPACE sales OFFLINE； Which statements describe the effect of the command（）
单项选择题 You execute a command to resize a data file， sales.dbf， of size 200 MB in your database： ALTER DATABASE DATAFILE ’/remorse/sales.dbf’ RESIZE 150M； Which statement is true about this command（）