1z0-071 PDF - 1z0-071考古题推薦

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Oracle 1Z0-071認證考試是一項具有挑戰性的考試，需要在SQL編程和Oracle數據庫管理方面進行廣泛的知識和技能。該考試涵蓋了一系列主題，包括SQL選擇語句，數據操縱，表創建和管理以及數據庫安全性。通過考試的候選人將證明他們在這些領域的熟練程度，並將被公認為是SQL編程和Oracle數據庫管理方面的專家。

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1z0-071考古题推薦 & 1z0-071考試心得

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最新的 Oracle PL/SQL Developer Certified Associate 1z0-071 免費考試真題 (Q32-Q37):

問題 #32
Which two are true about a SQL statement using SET operators such as UNION?

A. The data type of each column returned by the second query must be implicitly convertible to the data type of the corresponding column returned by the first query.

B. The data type of each column returned by the second query must exactly match the data type of the corresponding column returned by the first query.

C. The names and number of columns must be identical for all SELECT statements in the query.

D. The number, but not names, of columns must be identical for all SELECT statements in the query.

E. The data type group of each column returned by the second query must match the data type group of the corresponding column returned by the first query.

答案：B,E

問題 #33
View the Exhibit and examine the details of the ORDER_ITEMS table.

Evaluate the following SQL statements:
Statement 1:
SELECT MAX(unit_price*quantity) "Maximum Order"
FROM order_items;
Statement 2:
SELECT MAX(unit_price*quantity) "Maximum Order"
FROM order_items
GROUP BY order_id;
Which statements are true regarding the output of these SQL statements? (Choose all that apply.)

A. Statement 1 would return only one row of output.

B. Statement 2 would return multiple rows of output.

C. Statement 1 would not return give the same output.

D. Both the statements would give the same output.

E. Both statements would ignore NULL values for the UNIT_PRICE and QUANTITY columns.

答案：A,B,E

問題 #34
Evaluate the following SQL commands:

The command to create a table fails. Identify the reason for the SQL statement failure.

A. You cannot use ORD_NOand ITEM_NOcolumns as a composite primary key because ORD_NOis also the FOREIGN KEY.

B. You cannot use the BETWEENclause in the condition of a CHECKconstraint.

C. You cannot use SYSDATEin the condition of a CHECKconstraint.

D. You cannot use the NEXTVALsequence value as a DEFAULTvalue for a column.

答案：C

問題 #35
In the customers table, the CUST_CITY column contains the value 'Paris' for the CUST_FIRST_NAME 'Abigail'.
Evaluate the following query:

What would be the outcome?

A. Abigail Pa

B. Abigail PA

C. Abigail IS

D. An error message

答案：A

問題 #36
Examine this SQL statement
DELETE FROM employees e
WHERE EXISTS
(SELECT' dummy'
FROM emp history
WHERE employee_ id= e. employee id);
Which two are true?