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Oracle 1z1-071 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 Retrieval	- SELECT statements and filtering data 1. ORDER BY and row limiting 2. WHERE clause and conditions - Joins and set operations 1. UNION, INTERSECT, MINUS 2. INNER, OUTER, CROSS joins
Topic 3: Subqueries and Advanced SQL	- Single-row and multi-row subqueries - Correlated subqueries and nested queries
Topic 4: Relational Database Concepts	- Tables, rows, columns, and relational model basics - Data types and database objects overview
Topic 5: SQL Functions	- Conversion and conditional functions 1. TO_CHAR, TO_NUMBER, CASE expressions - Single-row functions 1. Character, numeric, date functions

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Oracle Database SQL Sample Questions (Q186-Q191):

NEW QUESTION # 186
Which three statements are correct regarding indexes? (Choose three.)

A. Indexes should be created on columns that are frequently referenced as part of any expression.
B. A non-deferrable PRIMARY KEY or UNIQUE KEY constraint in a table automatically attempts to create a unique index.
C. For each DML operation performed on a table, the corresponding indexes are automatically updated if required.
D. When a table is dropped, corresponding indexes are automatically dropped.

Answer: B,C,D

Explanation:
http://viralpatel.net/blogs/understanding-primary-keypk-constraint-in-oracle/

NEW QUESTION # 187
You must create a table EMPLOYEES in which the values in the columns EMPLOYEES_ID and LOGIN_ID must be unique and not null. (Choose two.) Which two SQL statements would create the required table?

A. CREATE TABLE employees(employee_id NUMBER,login_id NUMBER,employee_name VARCHAR2(25),hire_date DATE,CONSTRAINT emp_id_pk PRIMARY KEY (employee_id, login_id));
B. CREATE TABLE employees(employee_id NUMBER,Login_id NUMBER,Employee_name VARCHAR2(100),Hire_date DATE,CONSTRAINT emp_id_uk UNIQUE (employee_id, login_id);CONSTRAINT emp_id_nn NOT NULL (employee_id, login_id));
C. CREATE TABLE employees(employee_id NUMBER CONSTRAINT emp_id_pk PRIMARY KEY, Login_id NUMBER UNIQUE, Employee_name VARCHAR2(25),Hire_date DATE);
D. CREATE TABLE employees(employee_id NUMBER CONSTRAINT emp_id_nn NOT NULL, Login_id NUMBER CONSTRAINT login_id_nn NOT NULL,Employee_name VARCHAR2(100),Hire_date DATE,CONSTRAINT emp_id_ukUNIQUE (employee_id, login_id));
E. CREATE TABLE employees(employee_id NUMBER,Login_id NUMBER,Employee_name VARCHAR2(100),Hire_date DATE,CONSTRAINT emp_id_ukUNIQUE (employee_id, login_id));

Answer: A,D

NEW QUESTION # 188
Examine this query:
SELECT TRUNC(ROUND(156.00, -2), -1) FROM DUAL;
What is the result?

A. 0
B. 1
C. 2
D. 3
E. 4

Answer: D

Explanation:
Explanation
Reference https://docs.oracle.com/cd/B19306_01/server.102/b14200/functions200.htm

NEW QUESTION # 189
Examine the description of the EMPLOYEES table:

Which query requires explicit data type conversion?

A. SELECT SUBSTR(join_date, 1, 2) - 10 FROM employees;
B. SELECT join_date || ' ' || salary FROM employees;
C. SELECT join_date FROM employees WHERE join_date > '10-02-2018';
D. SELECT salary + '120.50' FROM employees;
E. SELECT join_date + '20' FROM employees;

Answer: C

Explanation:
Explanation

NEW QUESTION # 190
Which two statements are true about selecting related rows from two tables based on entity relationship diagram (ERD)?

A. An inner join relates rows within the same table.
B. Rows from unrelated tables cannot be joined.
C. Every relationship between the two tables must be implemented in a Join condition.
D. Relating data from a table with data from the same table is implemented with a self join.
E. Implementing a relationship between two tables might require joining additional tables.

Answer: D,E

NEW QUESTION # 191
......

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