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提问人:网友ading10 发布时间:2022-01-07
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Evaluate this SQL statement:SELECT ename, sal, 12* sal+100 FROM emp;The SAL column stores

the monthly salary of the employee. Which change must be made to the above syntax to calculate the annual compensation as "monthly salary plus a monthly bonus of $100, multiplied by 12"?()

A. No change is required to achieve the desired results.

B. SELECT ename, sal, 12* (sal+100) FROM emp;

C. SELECT ename, sal, (12* sal)+100 FROM emp;

D. SELECT ename, sal +100,*12 FROM emp;

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Which machine can make the ore size smallest?

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B.V$SESSION

C.V$W0041ITS

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第4题
You executed the following commands in a database session:What could have caused the recycle bin to clean up?()

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C. The new table name is the same as the table name in the recycle bin

D. The temporary tablespace that is assigned to you does not have sufficient free space

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第5题
Examine the structure of the EMPLOYEES table:EMPLOYEE_ID NUMBER NOT NULLEMP_NAME VARCHAR2(30)JOB_ID VARCHAR2(20)SAL NUMBERMGR_ID NUMBERDEPARTMENT_ID NUMBERYou want to create a SQL script file that contains an INSERT statement. When the script is run, the INSERT statement should insert a row with the specified values into the EMPLOYEES table. The INSERT statement should pass values to the table columns as specified below:EMPLOYEE_ID: Next value from the sequenceEMP_ID_SEQEMP_NAME and JOB_ID: As specified by the user during run time, through substitution variablesSAL: 2000MGR_ID: No valueDEPARTMENT_ID: Supplied by the user during run time through substitution variable. The INSERT statement should fail if the user supplies a value other than 20 or 50.Which INSERT statement meets the above requirements?()

A. INSERT INTO employees VALUES (emp_id_seq.NEXTVAL, &ename‘,‘&jobid‘, 2000, NULL, &did);

B. INSERT INTO employees VALUES (emp_id_seq.NEXTVAL, ‘&ename‘, ‘&jobid‘, 2000, NULL, &did IN (20,50));

C. INSERT INTO (SELECT * FROM employees WHERE department_id IN (20,50)) VALUES (emp_id_seq.NEXTVAL, &ename‘,‘&jobid‘, 2000, NULL, &did);

D. INSERT INTO (SELECT * FROM employees WHERE department_id IN (20,50) WITH CHECK OPTION) VALUES (emp_id_seq.NEXTVAL, &ename‘,‘&jobid‘, 2000, NULL, &did);

E. INSERT INTO (SELECT * FROM employees WHERE (department_id = 20 AND department_id = 50) WITH CHECK OPTION ) VALUES (emp_id_seq.NEXTVAL, &ename‘,‘&jobid‘, 2000, NULL, &did);

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第6题
You need to perform these tasks:1. Create and assign a MANAGER role to Blake and Clark2. Grant CREATE TABLE and CREATE VIEW privileges to Blake and Clark Which set of SQL statements achieves the desired results?()

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第7题
You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table.Before executing the FLASHBACK TABLE command, thesystem change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that thetable is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command.Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command?()

A. Restore the backup control file and open the database with RESETLOGS option.

B. Perform point-in-time recovery because flashback cannot be performed again on this table

C. Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571

D. Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571

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第8题
WhatdoestheSCNrepresent?()

A.Thesystemchangenumber,whichisapointintimerelativetotransactionswithinagivendatabase.

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C.Thesecuritychangenumber,whichrepresentsthesecuritycodethatisneededtoaccessanydatabasestructure.

D.Aconversionfactorthatconvertsinternaldatabasetimetoexternalclocktime.

E.UTCtimeinthedatabase,providingastandardizedwayoftrackingtimeinOracle.

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第9题
The CUSTOMERS table has these columns:CUSTOMER_ID NUMBER (4) NOT NULLCUSTOMER_NAME VARCHAR2 (100) NOT NULLSTREET_ADDRESS VARCHAR2 (150)CITY_ADDRESS VARHCAR2 (50)STATE_ADDRESS VARCHAR2 (50)PROVINCE_ADDRESS VARCHAR2 (50)COUNTRY_ADDRESS VARCHAR2 (50)POSTAL_CODE VARCHAR2 (12)CUSTOMER_PHONE VARCHAR2 (20)The CUSTOMER_ID column is the primary key for the table.You need to determine how dispersed your customer base is. Which expression finds the number of different countries represented in the CUSTOMERS table?()

A. COUNT(UPPER(country_address))

B. COUNT(DIFF(UPPER(country_address)))

C. COUNT(UNIQUE(UPPER(country_address)))

D. COUNT DISTINTC UPPER(country_address)

E. COUNT(DISTINTC (UPPER(country_address)))

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