EAN（europeanarticlenumber)是（)。A．欧洲商品数码B．欧洲物品编码C．欧洲条码系统D．通用条码系统

A. ASCII

B. ANSI

C. BINARY

D. MONOLINGUAL

E. MULTILINGUAL

ype RemarksEMPLOYEE_ID NUMBER NOT NULL, Primary KeyEMP_NAME VARCHAR2 (30)JOB_ID VARCHAR2 (20)SALARY NUMBERMGR_ID NUMBER References EMPLOYEE_ID COLUMNDEPARTMENT ID NUMBER Foreign key to DEPARTMENT ID column of the DEPARTMENTS tableDEPARTMENTSColumn name Data type RemarksDEPARTMENT_ID NUMBER NOT NULL, Primary Key DEPARTMENT_NAME VARCHAR2(30)MGR_ID NUMBER References MGR_ID column of the EMPLOYEES tableEvaluate this SQL statement:SELECT employee_id, e.department_id, department_name, salaryFROM employees e, departments dWHERE e. department_id = d.department_id;Which SQL statement is equivalent to the above SQL statement? （）

A. SELECT employee_id, department_id, department_name, salary FROM employees WHERE department_id IN (SELECT department_id FROM departments);

B. SELECT employee_id, department_id, department_name, salary FROM employees NATURAL JOIN departments;

C. SELECT employee_id, d.department_id, department_name, salary FROM employees e JOIN departments d ON e.department _ id = d. department_id;

D. SELECT employee_id, department_id, department_name, Salary FROM employees JOIN departments USING (e.department_id, d.department_id);

A.ASMprovidesmirroringonfilebyfilebasis.

B.ASMprovidesautomaticloadbalancingacrossallASMdisks.

C.ASMsupportstheOracledatabaseandoperatingsystemfiles.

D.ASMcanbeusedtostoretracefiles，alertlogfiles，andtheserverparameterfile（SPFILE）.

A.Nowarninglevelorcriticallevelalertwillbegenerated.

B.Awarninglevelalertwillneverbegenerated，butacriticallevelalertwillbegeneratedwhen97percentspaceoftheDATA1tablespaceisused.

C.Acriticallevelalertwillneverbegenerated，butawarninglevelalertwillbegeneratedwhen85percentspaceoftheDATA1tablespaceisused.

D.Awarninglevelalertwillbegeneratedat85percentspaceusageoftheDATA1tablespace，andacriticallevelalertisgeneratedat97percentspaceusageoftheDATA1tablespace.

tabaseinstancestartedandhasexperiencedworkloadsofdifferentcapacities：SQL>SELECTsubstr（component，0，10）COMP，current_sizeCS，user_specified_sizeUSFROMv$memory_dynamic_componentsWHEREcurrent_size!=0；Whatdoyouinferfromthis（）

A.ThedatabaseinstanceisrunningwithmanualPGAmanagement.

B.Thedatabaseinstanceisrunningwithmanualsharedmemorymanagement.

C.ThedatabaseinstancehastheMEMORY_TARGETvaluesettoanonzerovalue.

D.Allsessionsareconnectedtothedatabaseinstanceindedicatedmode，andnoRMANorparallelqueryoperationshavebeenperformed

A. TIMESTAMP

B. DATE

C. TIMESTAMP WITH TIME ZONE

D. TIMESTAMP WITH LOCAL TIME ZONE

E. DATETIME

A.FGAispossibleonSELECTstatementsonly.

B.TheaudittrailforFGAisstoredintheFGA_LOG$table.

C.TheaudittrailforFGAisstoredintheAUD_LOG$table.

D.FGAenablesaSQLpredicatetodefinewhentoauditanevent.

E.FGAauditsDELETEstatementsonlywhenauditcolumnsarespecified.

F.FGAincludestheSQLstatementusedbytheuseraspartoftheauditevententry.

A.INDEX_STATS

B.DBA_INDEXES

C.DBA_IND_COLUMNS

D.V$OBJECT_USAGE

A.ThebackupperformedonSundayscontainsalltheblocksthathaveeverbeenusedinthedatabase.

B.ThebackupperformedonSundayscontainsalltheblocksthathavechangedsincethelastlevel1backup.

C.Thebackupperformedoneachworkingdaycontainsalltheblocksthathavechangedsincethelastlevel0 backup.

D.ThebackupperformedonMondaycontainsalltheblocksthathavechangedsincethelevel0backup，and everyotherworkingdaycontainsalltheblocksthathavechangedsincethelevel1backup

A. V$VALID_NLS_VALUES

B. NLS_VALID_VALUES

C. NLS_VALUE_OPTIONS

D. V$NLS_VALUE_OPTIONS

E. V$NLS_VALID_VALUES