AUTHORITATIVE RELIABLE 1Z0-071 EXAM PATTERN | AMAZING PASS RATE FOR 1Z0-071: ORACLE DATABASE SQL | ACCURATE NEW 1Z0-071 STUDY GUIDE

Authoritative Reliable 1z0-071 Exam Pattern | Amazing Pass Rate For 1z0-071: Oracle Database SQL | Accurate New 1z0-071 Study Guide

Authoritative Reliable 1z0-071 Exam Pattern | Amazing Pass Rate For 1z0-071: Oracle Database SQL | Accurate New 1z0-071 Study Guide

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To be eligible to take the Oracle 1z0-071 exam, candidates must have a fundamental understanding of SQL and relational database concepts. They should also have a basic understanding of Oracle database architecture and be familiar with SQL developer tools. Candidates should also have practical experience in writing SQL statements and working with Oracle databases.

Oracle 1z0-071 certification exam is intended for individuals who want to demonstrate their expertise in SQL programming for Oracle databases. 1z0-071 Exam is ideal for database administrators, developers, and programmers who work with Oracle databases on a regular basis. It is also suitable for individuals who are looking to advance their careers in the field of database management.

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Oracle Database SQL Sample Questions (Q21-Q26):

NEW QUESTION # 21
Examine the structure of the INVOICEtable.

Which two SQL statements would execute successfully?
SELECT inv_no, NVL2(inv_date, 'Pending', 'Incomplete')

  • A. FROM invoice;
  • B. FROM invoice;
    SELECT inv_no, NVL2(inv_amt, inv_date, 'Not Available')
  • C. FROM invoice;
    SELECT inv_no, NVL2(inv_date, sysdate-inv_date, sysdate)
  • D. FROM invoice;
    SELECT inv_no, NVL2(inv_amt, inv_amt*.25, 'Not Available')

Answer: B,D


NEW QUESTION # 22
Examine this SQL statement:

Which two are true?

  • A. The UPDATE statement executes successfully even if the subquery selects multiple rows.
  • B. The subquery is not a correlated subquery.
  • C. The subquery is executed for every updated row in the ORDERS table.
  • D. The subquery is executed before the UPDATE statement is executed.
  • E. All existing rows in the ORDERS table are updated.

Answer: C,D

Explanation:
The provided SQL statement is an update statement that involves a subquery which is correlated to the main query.
* A. The subquery is executed before the UPDATE statement is executed. (Incorrect) This statement is not accurate in the context of correlated subqueries. A correlated subquery is one where the subquery depends on values from the outer query. In this case, the subquery is executed once for each row that is potentially updated by the outer UPDATE statement because it references a column from the outer query (o.customer_id).
* B. All existing rows in the ORDERS table are updated. (Incorrect)
Without a WHERE clause in the outer UPDATE statement, this would typically be true. However, the correctness of this statement depends on the actual data and presence of matching customer_id values in both tables. If there are rows in the ORDERS table with customer_id values that do not exist in the CUSTOMERS table, those rows will not be updated.
* C. The subquery is executed for every updated row in the ORDERS table. (Correct) Because the subquery is correlated (references o.customer_id from the outer query), it must be executed for each row to be updated in the ORDERS table to get the corresponding cust_last_name from the CUSTOMERS table.


NEW QUESTION # 23
Evaluate the following query:

What would be the outcome of the above query?

  • A. It produces an error because flower braces have been used.
  • B. It executes successfully and introduces an 'sat the end of each promo_namein the output.
  • C. It executes successfully and displays the literal " {'s start date was > "for each row in the output.
  • D. It produces an error because the data types are not matching.

Answer: B


NEW QUESTION # 24
Evaluate the following two queries:

Which statement is true regarding the above two queries?

  • A. There would be no change in performance.
  • B. Performance would improve in query 2.
  • C. Performance would degrade in query 2.
  • D. Performance would improve in query 2 only if there are null values in the CUST_CREDIT_LIMIT column.

Answer: A


NEW QUESTION # 25
View the Exhibit and examine the structure of the PRODUCT_INFORMATION and INVENTORIES tables.
You have a requirement from the supplies department to give a list containing PRODUCT_ID, SUPPLIER_ID, and QUANTITY_ON_HAND for all the products wherein QUANTITY_ON_HAND is less than five.
Which two SQL statements can accomplish the task? (Choose two.)

  • A. SELECT i.product_id, i.quantity_on_hand, pi.supplier_idFROM product_information pi JOIN inventories iON (pi.product_id=i.product_id)WHERE quantity_on_hand < 5;
  • B. SELECT i.product_id, i.quantity_on_hand, pi.supplier_idFROM product_information pi JOIN inventories iON (pi.product_id=i.product_id) AND quantity_on_hand < 5;
  • C. SELECT product_id, quantity_on_hand, supplier_idFROM
    product_informationNATURAL JOIN inventories AND quantity_on_hand < 5;
  • D. SELECT i.product_id, i.quantity_on_hand, pi.supplier_idFROM product_information pi JOIN inventories iON (pi.product_id=i.product_id)USING (product_id) AND quantity_on_hand < 5;

Answer: A,B


NEW QUESTION # 26
......

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