查询scott用户的emp表中的总记录数,可以使用下列哪个语句?() A: SELECT MAX(empno) FROM scott.emp; B: SELECT<br/>COUNT(empno) FROM scott.emp; C: SELECT COUNT(comm) FROM scott.emp; D: SELECT COUNT(*) FROM scott.emp;

You are shrinking the SCOTT.EMP table by executing the ALTER TABLE SCOTT.EMP SHRINK SPACE CASCADE statement. What is a prerequisite for shrinking the SCOTT.EMP table？（） A:  You must enable the block change tracking feature. B:  You must have enable the flashback feature. C:  You must use the OMF in your database. D:  You must define the tablespace of the SCOT E: EMP table for automatic segment space management.

查询scott用户的emp表中的总记录数，可以使用下列哪个语句？

解锁scott用户的正确命令是_______。 A: update user scott account unlock B: alert user scott account unlock C: update user scott unlock D: alert user scott unlock

解锁scott用户的正确命令是（ ）。 A: update user scott account unlock B: alter user scott account unlock C: update user scott unlock D: alter user scott unlock

You are shrinking the SCOTT.EMP table by executing the ALTER TABLE SCOTT.EMP SHRINK SPACE CASCADE statement. What is a prerequisite for shrinking the SCOTT.EMP table？（） A: You must enable the block change tracking feature. B: You must have enable the flashback feature. C: You must use the OMF in your database. D: You must define the tablespace of the SCOTEMP table for automatic segment space management.

What will Mr. Grant do to Mr. Scott’s idea A: He will think about Mr. Scott’s idea. B: He will copy Mr. Scott’s idea. C: He will object to Mr. Scott’s idea.

Scott'shistoricalnovelstouchuponthesubje...ofEuropeancountries.

Walter Scott was ______.

以下能删除表的语句是( ) A: Delete * from emp B: Drop database emp C: Drop * from emp D: delete database emp