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Oracle 1z0-071 Exam Syllabus Topics:

Section	Objectives
Topic 1: Data Manipulation and Schema Objects	- DDL operations 1. CREATE, ALTER, DROP tables and constraints - DML operations 1. INSERT, UPDATE, DELETE, MERGE
Topic 2: SQL Functions	- Conversion and conditional functions 1. TO_CHAR, TO_NUMBER, CASE expressions - Single-row functions 1. Character, numeric, date functions
Topic 3: SQL Retrieval	- SELECT statements and filtering data 1. WHERE clause and conditions 2. ORDER BY and row limiting - Joins and set operations 1. UNION, INTERSECT, MINUS 2. INNER, OUTER, CROSS joins
Topic 4: Relational Database Concepts	- Tables, rows, columns, and relational model basics - Data types and database objects overview
Topic 5: Subqueries and Advanced SQL	- Correlated subqueries and nested queries - Single-row and multi-row subqueries

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Oracle Database SQL Sample Questions (Q324-Q329):

NEW QUESTION # 324
Examine the structure of the MARKStable:

Which two statements would execute successfully? (Choose two.)
SELECT SUM(DISTINCT NVL(subject1,0)), MAX(subject1)

A. FROM marks
WHERE student_name LIKE 'R%';
B. FROM marks
WHERE subject1 > AVG(subject1);
SELECT SUM(subject1+subject2+subject3)
C. FROM marks
WHERE student_name IS NULL;
SELECT student_name,SUM(subject1)
D. FROM marks
WHERE subject1 > subject2;
SELECT student_name subject1

Answer: C,D

NEW QUESTION # 325
View the exhibit and examine the description of the DEPARTMENTSand EMPLOYEEStables.

The retrieve data for all the employees for their EMPLOYEE_ID, FIRST_NAME, and DEPARTMENT NAME, the following SQL statement was written:
SELECT employee_id, first_name, department_name
FROM employees
NATURAL JOIN departments;
The desired output is not obtained after executing the above SQL statement. What could be the reason for this?

A. The EMPLOYEESand DEPARTMENTStables have more than one column with the same column name and data type.
B. The table prefix is missing for the column names in the SELECTclause.
C. The DEPARTMENTStable is not used before the EMPLOYEEStable in the FROMclause.
D. The NATURAL JOINclause is missing the USINGclause.

Answer: A

Explanation:
Explanation/Reference:
Explanation:
Natural join needs only one column to be the same in each table. The EMPLOYEESand DEPARTMENTS tables have two columns that are the same (Department_ID and Manager_ID)

NEW QUESTION # 326

For each employee in department 90 you want to display:
1. their last name
2. the number of complete weeks they have been employed
The output must be sorted by the number of weeks, starting with the longest serving employee first.Which statement will accomplish this?

A. SELECT last_name, TRUNC( (SYSDATE - hire_ date) 1 7) AS tenure
FROM employees
WHERE department_ id = 90
ORDER BY tenure ;
B. SELECT last_name, ROUND( (SYSDATE - hire_ date) 17) AS tenure
FROM employees
WHERE department_ id = 90
ORDER BY tenure DESC;
C. SELECT last_name, TRUNC ( (SYSDATE - - hire_ date) 1 7) AS tenure
FROM employees
WHERE department_id = 90
ORDER BY tenure DESC;
D. SELECT last_name, ROUND( (SYSDATE - hire_ date) 1 7) AS tenure
FROM employees
WHERE department_ id = 90
ORDER BY tenure ;

Answer: C

Explanation:
D). True. The TRUNC function, when applied to the difference between SYSDATE and hire_date divided by
7, will return the number of complete weeks of employment. The ORDER BY tenure DESC will sort the result in descending order, starting with the longest-serving employee.
A is incorrect because it does not include the DESC keyword necessary to start with the longest-serving employee. B is incorrect because ROUND could result in rounding up to the next week, which does not give the number of complete weeks. C is incorrect because the division is done by 17 instead of 7, which is likely a typo, and ROUND is used instead of TRUNC.

NEW QUESTION # 327
Examine this query:
SELECT employee_id, first_name, salary
FROM employees
WHERE hiredate > 61*
Which two methods should yours to prevent prompting for hire date value when this queries executed?

A. Store the query in a script and pass the substitution value to the script when executing it.
B. Execute the SET VERIFY OFF command before executing the query.
C. Execute the SET VERIFY ON command before executing the query.
D. Replace 's1' with &1'in the query:
E. Use the UNDEFINE command before executing the query.
F. Use the DEFINE command before executing the query

Answer: B,F

Explanation:
To prevent the prompting for a substitution variable value when executing a query:
* B. Execute the SET VERIFY OFF command before executing the query: This command turns off the substitution variable prompting, which means that SQL*Plus will not prompt for a value and will use whatever value is currently set for that variable.
* F. Use the DEFINE command before executing the query: By using the DEFINE command to set a value for the variable before the query execution, you ensure that SQL*Plus uses this predefined value instead of prompting for it.
References:
* Oracle SQL*Plus User's Guide and Reference, which discusses how to manage substitution variables.

NEW QUESTION # 328
View the exhibit and examine the data in ORDERS_MASTERand MONTHLY_ORDERStables.
ORDERS_MASTER
ORDER_TOTAL
ORDER_ID
1 1000
2 2000
3 3000
4
MONTHLY_ORDERS
ORDER_TOTAL
ORDER_ID
2 2500
3
Evaluate the following MERGEstatement:
MERGE_INTO orders_master o
USING monthly_orders m
ON (o.order_id = m.order_id)
WHEN MATCHED THEN
UPDATE SET o.order_total = m.order_total
DELETE WHERE (m.order_total IS NULL)
WHEN NOT MATCHED THEN
INSERT VALUES (m.order_id, m.order_total)
What would be the outcome of the above statement?

A. The ORDERS_MASTERtable would contain the ORDER_IDs1, 2 and 3.
B. The ORDERS_MASTERtable would contain the ORDER_IDs1, 2, 3 and 4.
C. The ORDERS_MASTERtable would contain the ORDER_IDs1, 2 and 4.
D. The ORDERS_MASTERtable would contain the ORDER_IDs1 and 2.

Answer: C

Explanation:
Explanation/Reference:
References:
https://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_9016.htm

NEW QUESTION # 329
......

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