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最新的 Oracle Database 19c 1Z0-082 免費考試真題 (Q82-Q87):

問題 #82
Examine this description of the TRANSACTIONS table:

Which two SQL statements execute successfully? (Choose two.)
SELECT customer_id AS "CUSTOMER-ID", transaction_date AS DATE, amount + 100

A. "DUES" FROM transactions;
SELECT customer_id AS "CUSTOMER-ID", transaction_date AS "DATE", amount + 100
B. DUES FROM transactions;
SELECT customer_id AS CUSTOMER-ID, transaction_date AS TRANS_DATE, amount +
C. transactions;
SELECT customer_id AS 'CUSTOMER-ID', transaction_date AS DATE, amount + 100
D. 100 "DUES AMOUNT" FROM transactions;
SELECT customer_id CUSTID, transaction_date TRANS_DATE, amount + 100 DUES FROM
E. 'DUES AMOUNT' FROM transactions;

答案：B,C

問題 #83
Which three statements are true regarding single row subqueries?

A. They must be placed on the right side of the comparison operator or condition.
B. They must return a row to prevent errors in the SQL statement.
C. A SQL statement may have multiple single row subquery blocks.
D. They can be used in the where clause.
E. They must be placed on the left side of the comparison operator or condition.
F. They can be used in the having clause.

答案：C,D,F

問題 #84
Evaluate these commands which execute successfully:

Which two statements are true about the ORD_ITEMS table and the ORD_SEQ sequence? (Choose two.)

A. Column ORD_NO gets the next number from sequence ORD_SEQ whenever a row is inserted into ORD_ITEMS and no explicit value is given for ORD_NO
B. Sequence ORD_SEQ is guaranteed not to generate duplicate numbers
C. Any user inserting rows into table ORD_ITEMS must have been granted access to sequence ORD_SEQ
D. If sequence ORD_SEQ is dropped then the default value for column ORD_NO will be NULL for rows inserted into ORD_ITEMS
E. Sequence ORD_SEQ cycles back to 1 after every 5000 numbers and can cycle 20 times

答案：B,C

問題 #85
In the ORCL database, UNDOTBS1 is the active undo tablespace with these properties:
1. A size of 100 MB
2. AUTOEXTEND is off
3. UNDO_RETENTION is set to 15 minutes
4. It has RETENTION GUARANTEE
UNDOTBS1 fills with uncommitted undo 10 minutes after the database opens.
What will happen when the next update is attempted by any transaction?

A. It succeeds and the least recently written undo block of UNDOTBS1 is overwritten by the generated undo.
B. It fails and returns the error message "ORA-30036: unable to extend segment by 8 in undo tablespace
'UNDOTBS1'".
C. It succeeds and the least recently read undo block of UNDOTBS1 is overwritten by the generated undo.
D. It succeeds and the generated undo is stored in SYSTEM.
E. It succeeds and the generated undo is stored in SYSAUX.

答案：A

問題 #86
Table EMPLOYEES contains columns including EMPLOYEE_ID, JOB_ID and SALARY.
Only the EMPLOYEE_ID column is indexed.
Rows exist for employees 100 and 200.
Examine this statement:

Which two statements are true? (Choose two.)

A. Employee 200 will have JOB_ID set to the same value as the JOB_ID of employee 100
B. Employee 100 will have SALARY set to the same value as the SALARY of employee 200
C. Employee 100 will have JOB_ID set to the same value as the JOB_ID of employee 200
D. Employees 100 and 200 will have the same JOB_ID as before the update command
E. Employee 200 will have SALARY set to the same value as the SALARY of employee 100
F. Employees 100 and 200 will have the same SALARY as before the update command

答案：A,B

問題 #87
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