1z0-071 - High Hit-Rate Oracle Database SQL New Learning Materials

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Oracle 1z0-071 Exam Syllabus Topics:

Section	Objectives
SQL Retrieval	- SELECT statements and filtering data 1. ORDER BY and row limiting 2. WHERE clause and conditions - Joins and set operations 1. INNER, OUTER, CROSS joins 2. UNION, INTERSECT, MINUS
Relational Database Concepts	- Data types and database objects overview - Tables, rows, columns, and relational model basics
Subqueries and Advanced SQL	- Correlated subqueries and nested queries - Single-row and multi-row subqueries
SQL Functions	- Conversion and conditional functions 1. TO_CHAR, TO_NUMBER, CASE expressions - Single-row functions 1. Character, numeric, date functions
Data Manipulation and Schema Objects	- DDL operations 1. CREATE, ALTER, DROP tables and constraints - DML operations 1. INSERT, UPDATE, DELETE, MERGE

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Oracle Database SQL Sample Questions (Q32-Q37):

NEW QUESTION # 32
View the Exhibit and examine the description of the EMPLOYEEStable.

Evaluate the following SQL statement:
SELECT first_name, employee_id, NEXT_DAY(ADD_MONTHS(hire_date, 6), 1)
"Review" FROM employees;
The query was written to retrieve the FIRST_NAME, EMPLOYEE_ID,and review date for employees. The review date is the firsts Monday after the completion of six months of the hiring.
The NLS_TERRITORYparameter is set to AMERICAin the session.
Which statement is true regarding this query?

A. The query would not execute because the NEXT_DAY function accepts a string as argument.
B. The query would not execute because date functions cannot be nested.
C. The query would execute to give the desired output.
D. The query would execute but the output would give review dates that are Sundays.

Answer: D

NEW QUESTION # 33
Which three statements are true about dropping and unused columns in an Oracle database?

A. An unused column's space is reclaimed automatically when the row containing that column is next queried.
B. An unused column's space is reclaimed automatically when the block containing that column is next queried.
C. A column that is set to unused still counts towards the limit of 1000 columns per table.
D. A drop column command can be rolled back.
E. A primary key column referenced by another column as a foreign key can be dropped if using the cascade option.
F. Partition key columns cannot be dropped.

Answer: B,C,F

NEW QUESTION # 34
Examine the data in the COLORS table:

Examine the data in the BRICKS table:

Which two queries return all the rows from COLORS?

Answer: B,D

NEW QUESTION # 35
View the Exhibit and examine the structure of the ORDER_ITEMS table.

You must select the ORDER_ID of the order that has the highest total value among all the orders in the ORDER_ITEMS table.
Which query would produce the desired result?

A. SELECT order_idFROM order_itemsWHERE (unit_price*quantity) = (SELECT MAX(unit_price*quantity)FROM order_itemsGROUP BY order_id)
B. SELECT order_idFROM order_itemsWHERE(unit_price*quantity) = MAX(unit_price*quantity)GROUP BY order_id;
C. SELECT order_idFROM order_itemsGROUP BY order_idHAVING SUM(unit_price*quantity) = (SELECT MAX(SUM(unit_price*quantity))FROM order_items GROUP BY order_id);
D. SELECT order_idFROM order_itemsWHERE(unit_price*quantity) = (SELECT MAX(unit_price*quantity)FROM order_items)GROUP BY order_id;

Answer: C

NEW QUESTION # 36
Which three statements are true about indexes and their administration in an Oracle database?

A. An INVISIBLE index is not maintained when Data Manipulation Language (DML) is performed on its underlying table.
B. If a query filters on an indexed column then it will always be used during execution of the query.
C. A DROP INDEX statement always prevents updates to the table during the drop operation.
D. A descending index is a type of function-based index.
E. A UNIQUE and non-unique index can be created on the same table column.
F. An index can be created as part of a CREATE TABLE statement.

Answer: A,D,F

NEW QUESTION # 37
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