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Oracle 1z0-071 Exam Syllabus Topics:

Section	Objectives
Subqueries and Advanced SQL	- Correlated subqueries and nested queries - Single-row and multi-row subqueries
SQL Functions	- Single-row functions 1. Character, numeric, date functions - Conversion and conditional functions 1. TO_CHAR, TO_NUMBER, CASE expressions
Data Manipulation and Schema Objects	- DML operations 1. INSERT, UPDATE, DELETE, MERGE - DDL operations 1. CREATE, ALTER, DROP tables and constraints
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	- Tables, rows, columns, and relational model basics - Data types and database objects overview

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Oracle Database SQL Sample Questions (Q429-Q434):

NEW QUESTION # 429
Choose the best answer.
Examine the description of the EMPLOYEES table:

Which query is valid?

A. SELECT dept_id,AVG(MAX(salary)) FROM employees GROUP BY dapt_id;
B. SELECT depe_id,join_date,SUM(salary) FROM employees GROUP BY dept_id:
C. SELECT dept_id,MAX(AVG(salary)) FROM employees GROUP BY dept_id;
D. SELECT dept_id, join_date,SUM(salary) FROM employees GROUP BY dept_id, join_date;

Answer: D

NEW QUESTION # 430
Which two are true about the precedence of opertors and condtions

A. Operators are evaluated before conditions.
B. AND and OR have the same order of precedence in a condition
C. + (addition) has a higher order of precedence than * (mliplpition)
D. || has a higher order of precedence than +(addition)
E. NOT has a higher order of precedence than AND and OR in a condition.

Answer: A,E

NEW QUESTION # 431
In the EMPLOYEES table there are 1000 rows and employees are working in the company for more than
10 years.
Evaluate the following SQL statement:

What would be the result?

A. It gives an error because NVL function cannot be used with UPDATE.
B. It executes successfully and updates the records of those employees who have been working in the company for more than 600 days.
C. It executes successfully but no rows updated.
D. It gives an error because multiple NVL functions are used in an expression.

Answer: B

NEW QUESTION # 432
Evaluate the following CRTEATE TABLE commands:
CREATE_TABLE orders
(ord_no NUMBER (2) CONSTRAINT ord_pk PRIMARY KEY,
ord_date DATE,
cust_id NUMBER (4) );
CREATE TABLE ord_items
(ord _no NUMBER (2),
item_no NUMBER(3),
qty NUMBER (3) CHECK (qty BETWEEEN 100 AND 200),
expiry_date date CHECK (expiry_date> SYSDATE),
CONSTRAINT it_pk PRIMARY KEY (ord_no, item_no),
CONSTARAINT ord_fk FOREIGN KEY (ord_no) REFERENCES orders (ord_no) );
Why would the ORD_ITEMS table not get created?

A. The CHECK constraint cannot be placed on columns having the DATE data type.
B. SYSDATE cannot be used with the CHECK constraint.
C. ORD_NO and ITEM_NO cannot be used as a composite primary key because ORD_NO is also the FOREIGN KEY.
D. The BETWEEN clause cannot be used for the CHECK constraint.

Answer: B

NEW QUESTION # 433
Which three statements are true about an ORDER BY clause?

A. An ORDER BY clause can perform a binary sort
B. By default an ORDERBY clause sorts rows in ascending order
C. An ORDER BY clause can perform a linguistic sort
D. An ORDR BY clause will always precede a HAVI NG clause if both are used in the same top-level
E. An ORDER BY clause always sorts NULL values last.

Answer: A,B,C

Explanation:
In Oracle Database 12c, the behavior of the ORDER BY clause is guided by several rules:
Option B: An ORDER BY clause can perform a binary sort.
A binary sort is the default sorting mechanism in Oracle Database, which is based on the binary representation of the data.
Option C: An ORDER BY clause can perform a linguistic sort.
Oracle supports linguistic sorting through the use of the NLS_SORT parameter, which can be set to various linguistic and cultural norms.
Option D: By default, an ORDER BY clause sorts rows in ascending order.
If no ASC or DESC keyword is specified, Oracle will sort the results in ascending order by default.
Options A and E are incorrect:
Option A is not universally true; the position of NULL values in the sort order can be controlled by settings or specific SQL syntax (NULLS FIRST or NULLS LAST).
Option E is incorrect as the HAVING clause filters groups after data has been grouped by the GROUP BY clause and cannot be logically placed before ORDER BY in processing order.

NEW QUESTION # 434
......

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