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Oracle 1z1-071 Exam Syllabus Topics:

Section	Objectives
Subqueries and Advanced SQL	- Correlated subqueries and nested queries - Single-row and multi-row subqueries
SQL Retrieval	- Joins and set operations 1. UNION, INTERSECT, MINUS 2. INNER, OUTER, CROSS joins - SELECT statements and filtering data 1. ORDER BY and row limiting 2. WHERE clause and conditions
SQL Functions	- Single-row functions 1. Character, numeric, date functions - Conversion and conditional functions 1. TO_CHAR, TO_NUMBER, CASE expressions
Relational Database Concepts	- Data types and database objects overview - Tables, rows, columns, and relational model basics
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 (Q247-Q252):

NEW QUESTION # 247
View the exhibits and examine the structures of the COSTSand PROMOTIONStables.

Evaluate the following SQL statement:

What would be the outcome of the above SQL statement?

A. It displays prod IDs in the promos with the highest cost in the same time interval.
B. It displays prod IDs in the promo with the lowest cost.
C. It displays prod IDs in the promos with the lowest cost in the same time interval.
D. It displays prod IDs in the promos which cost less than the highest cost in the same time interval.

Answer: D

NEW QUESTION # 248
Which three statements are true about GLOBAL TEMPORARY TABLES?

A. A trigger can be created on a GLOBAL TEMPORARY TABLE
B. A GLOBAL TEMPORARY TABLE can have multiple indexes
C. A GLOBAL TEMPORARY TABLE cannot have PUBLIC SYNONYM.
D. A GLOBAL TEMPORARY TABLE can be referenced in the defining query of a view.
E. A GLOBAL TEMPORARY TABLE can have only one index.
F. Data Manipulation Language (DML) on GLOBAL TEMPORARY TABLES generates no REDO.

Answer: A,B,D

NEW QUESTION # 249
Examine the description of the EMPLOYEES table

You write this failing statement:
SELECT dept_no AS department_id, MAX (salary) As max_sal
FROM employees
WHERE salary >10000
GROUP BY department_id
ORDER BY max_sal;
Which clause causes the error?

A. GROUP BY
B. SELECT
C. ORDER BY
D. WHERE

Answer: A

Explanation:
In the SQL statement provided, the error is caused by the GROUP BY clause. In Oracle SQL, when using GROUP BY, the expression in the GROUP BY clause must match exactly the expression in the SELECT list. The GROUP BY clause should reference the column name dept_no as mentioned in the SELECT list, not the alias department_id which is defined within the same SELECT statement.
The corrected SQL statement should be:
SELECT dept_no AS department_id, MAX(salary) As max_sal FROM employees WHERE salary > 10000 GROUP BY dept_no -- Changed from 'department_id' to 'dept_no' ORDER BY max_sal; References:
* Oracle Documentation on GROUP BY clause: GROUP BY Clause

NEW QUESTION # 250
The following are the steps for a correlated subquery, listed in random order:
* The WHERE clause of the outer query is evaluated.
* The candidate row is fetched from the table specified in the outer query.
* This is repeated for the subsequent rows of the table, till all the rows are processed.
* Rows are returned by the inner query, after being evaluated with the value from the candidate row in the outer query.
Which is the correct sequence in which the Oracle server evaluates a correlated subquery?

A. 2, 1, 4, 3
B. 4, 1, 2, 3
C. 4, 2, 1, 3
D. 2, 4, 1, 3

Answer: D

Explanation:
Explanation
References:
http://rajanimohanty.blogspot.co.uk/2014/01/correlated-subquery.html

NEW QUESTION # 251
View the exhibit and examine the structure of the STOREStable.
STORES table
Name Null? Type
----------------- ----- -------------
STORE_ID NUMBER
NAME VARCHAR2(100)
ADDRESS VARCHAR2(200)
CITY VARCHAR2(100)
COUNTRY VARCHAR2(100)
START_DATE DATE
END_DATE DATE
PROPERTY_PRICE NUMBER
You want to display the NAME of the store along with the ADDRESS, START_DATE, PROPERTY_PRICE, and the projected property price, which is 115% of property price.
The stores displayed must have START_DATEin the range of 36 months starting from 01-Jan-2000 and above.
Which SQL statement would get the desired output?

A. SELECT name, concat (address| | ','| |city| |', ', country) AS full_address, start_date, property_price, property_price*115/100
FROM stores
WHERE TO_NUMBER(start_date-TO_DATE('01-JAN-2000','DD-MON-RRRR')) <=36;
B. SELECT name, concat (address||','| |city| |', ', country) AS full_address, start_date, property_price, property_price*115/100
FROM stores
WHERE MONTHS_BETWEEN (start_date, TO_DATE('01-JAN-2000','DD-MON-RRRR'))
<=36;
C. SELECT name, concat (address| | ','| |city| |', ', country) AS full_address, start_date, property_price, property_price*115/100
FROM stores
WHERE MONTHS_BETWEEN (start_date, '01-JAN-2000') <=36;
D. SELECT name, address||','||city||','||country AS full_address,
start_date,
property_price, property_price*115/100
FROM stores
WHERE MONTHS_BETWEEN (start_date, TO_DATE('01-JAN-2000','DD-MON-RRRR'))
<=36;

Answer: B

NEW QUESTION # 252
......

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