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Oracle 1z0-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q187-Q192):

NEW QUESTION # 187
View the Exhibit and examine PRODUCTS and ORDER_ITEMS tables.
You executed the following query to display PRODUCT_NAME and the number of times the product has been ordered:
SQL>SELECT p.product_name, i.item_cnt
FROM (SELECT product_id, COUNT (*) item_cnt
FROM order_items
GROUP BY product_id) i RIGHT OUTER JOIN products p
ON i.product_id = p.product_id;
What would happen when the above statement is executed?

A. The statement would not execute because the ITEM_CNT alias cannot be displayed in the outer query.
B. The statement would not execute because inline views and outer joins cannot be used together.
C. The statement would not execute because the GROUP BY clause cannot be used in the inline.
D. The statement would execute successfully to produce the required output.

Answer: D

NEW QUESTION # 188
Evaluate the following SQL commands:

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

A. You cannot use the NEXTVALsequence value as a DEFAULTvalue for a column.
B. You cannot use the BETWEENclause in the condition of a CHECKconstraint.
C. You cannot use ORD_NOand ITEM_NOcolumns as a composite primary key because ORD_NOis also the FOREIGN KEY.
D. You cannot use SYSDATEin the condition of a CHECKconstraint.

Answer: D

NEW QUESTION # 189
Which two statements are true about substitution variables? (Choose two.)

A. A substitution variable prefixed with && prompts only once for a value in a session unless it is set to undefined in the session
B. A substitution variable can be used only in a SELECT statement
C. A substitution variable used to prompt for a column name must be enclosed in double quotation marks
D. A substitution variable can be used with any clause in a SELECT statement
E. A substitution variable prefixed with & always prompts only once for a value in a session
F. A substitution variable used to prompt for a column name must be enclosed in a single quotation marks

Answer: E,F

Explanation:
https://blogs.oracle.com/opal/sqlplus-101-substitution-variables

NEW QUESTION # 190
You need to calculate the number of days from 1st January 2019 until today.
Dates are stored in the default format of DD-MON-RR.
Which two queries give the required output?

A. SELECT SYSDATE-TO_DATE ('01-JANUARY-2019') FROM DUAL;
B. SELECT ROUND (SYSDATE-TO_DATE ('01/JANUARY/2019')) FROM DUAL;
C. SELECT TO_DATE (SYSDATE, 'DD/MONTH/YYYY')-'01/JANUARY/2019' FROM DUAL;
D. SELECT ROUND (SYSDATE- '01-JAN-2019') FROM DUAL:
E. SELECT TO_CHAR (SYSDATE, 'DD-MON-YYYY')-'01-JAN-2019' FROM DUAL;

Answer: A,B

Explanation:
To calculate the number of days between two dates in Oracle SQL, you can simply subtract the earlier date from the later date, and Oracle will return the number of days between them.
Option A uses SYSDATE to get the current date and TO_DATE to convert the string '01-JANUARY-2019' to a date using the default date format, which matches 'DD-MON-RR'. The subtraction here will correctly give the number of days between these two dates.
Option C is similar to A but includes the ROUND function, which is used to round the number to the nearest whole number. Since the difference between two dates in Oracle SQL is a decimal value representing the number of days and fractional days, rounding will give us the whole number of days, which is what we want.
Options B, D, and E are incorrect because they either use an invalid date format (the default format is 'DD-MON-RR', not 'DD/MONTH/YYYY' or 'DD-MON-YYYY'), perform invalid operations (such as subtracting a string from a date), or misuse SYSDATE.

NEW QUESTION # 191
Which three are true about privileges?

A. A combination of object and system privileges can be granted to a role.
B. All types of schema objects have associated object privileges .
C. Only users with the GRANT ANY PRIVILEGE privilege can grant and revoke system privileges from other users.
D. Object privileges granted on a table automatically apply to all synonyms for that table.
E. Schema owners can grant object privileges on objects in their schema to any other user or role.
F. Only users with the DBA role can create roles .

Answer: A,B,E

NEW QUESTION # 192
......

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