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The user HR owns the EMP table. The user HR grants privileges to the user SCOTT by using this command： SQL> GRANT SELECT，INSERT，UPDATE ON emp TO scott WITH GRANT OPTION； The user SCOTT executes this command to grant privileges to the user JIM： SQL> GRANT SELECT，INSERT，UPDATE ON hr.emp TO jim； Now， the user HR decides to revoke privileges from JIM using this command： SQL> REVOKE SELECT，INSERT，UPDATE ON emp FROM jim； Which statement is true after HR issues the REVOKE command（）
- A、The command fails because SCOTT still has privileges.
- B、The command succeeds and privileges are revoked from JIM.
- C、The command fails because HR cannot revoke the privileges from JIM.
- D、The command succeeds and only HR has the privilege to perform the SELECT， INSERT， and UPDATEoperations on the EMP table.
参考答案
更多 “ The user HR owns the EMP table. The user HR grants privileges to the user SCOTT by using this command： SQL GRANT SELECT，INSERT，UPDATE ON emp TO scott WITH GRANT OPTION； The user SCOTT executes this command to grant privileges to the user JIM： SQL GRANT SELECT，INSERT，UPDATE ON hr.emp TO jim； Now， the user HR decides to revoke privileges from JIM using this command： SQL REVOKE SELECT，INSERT，UPDATE ON emp FROM jim； Which statement is true after HR issues the REVOKE command（）A、The command fails because SCOTT still has privileges.B、The command succeeds and privileges are revoked from JIM.C、The command fails because HR cannot revoke the privileges from JIM.D、The command succeeds and only HR has the privilege to perform the SELECT， INSERT， and UPDATEoperations on the EMP table.” 相关考题
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The command fails because SCOTT still has privileges.B
The command succeeds and privileges are revoked from JIM.C
The command fails because HR cannot revoke the privileges from JIM.D
The command succeeds and only HR has the privilege to perform the SELECT， INSERT， and UPDATEoperations on the EMP table.
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单选题The user SCOTT executes the following command successfully to increase the salary values in one of his sessions： SQL UPDATE emp SET sal=sal*1.15 WHERE deptno=20; Before SCOTT ends the transaction， user HR who has the privileges on EMP table executes a query to fetch the salary details but finds the old salary values instead of the increased values. Why does HR still see the old data？（）A
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because of undo data from the undo tablespace
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The table created by SKD is not accessible and SKD cannot create new tables.B
The tables created by SKD and HR remain， but both cannot create new tables.C
The table created by HR remains and HR still has the CREATE TABLE system privilege.D
The table created by HR remains and HR can grant the CREATE TABLE system privilege to other users.
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单选题All the database users are presently connected to the database instance and working. The HR user hasopened three database sessions and executed the following command in one of his sessions：SQL UPDATE persons SET ccode=’U031’ WHERE ccode=’U029’； 123 rows updated.SQL DELETE FROM persons WHERE exp=’Y’；3 rows deleted. The SYS user opens a new session after HR executed the above commands. Which sessions can see theeffect of the UPDATE and DELETE commands（）A
All sessions of the HR user onlyB
All sessions of the HR user and the SYS userC
The session of the HR user that executed the commandsD
All the sessions for which the database users have access privilege to the PERSONS table
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单选题下列选项中，能够解除HR用户的锁定的语句是（）。A
alter user hr unlockB
alter user hr account unlockC
alter table alter hr unlockD
alter table alter unlock hr
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