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Oracle 1z1-071 Exam Syllabus Topics:

Section	Weight	Objectives
Manipulating Data	14%	- Describe each data manipulation language (DML) statement - Insert rows into a table - Delete rows from a table - Control transactions - Update rows in a table
Displaying Data from Multiple Tables Using Joins	15%	- Join a table to itself by using a self-join - Cross join tables - View data that does not meet a join condition by using outer joins - Write SELECT statements to access data from more than one table using equijoins and non-equijoins
Creating Other Schema Objects	10%	- Create, maintain, and use sequences - Create and maintain indexes - Create synonyms for database objects - Create, modify, and retrieve data from a view
Controlling User Access	5%	- Grant privileges on tables and on a view - Differentiate system privileges from object privileges - Distinguish between granting privileges and roles
Using Subqueries to Solve Queries	15%	- Define subqueries - List the types of subqueries - Write single-row and multi-row subqueries - Describe the types of problems that subqueries can solve
Retrieving Data Using the SQL SELECT Statement	5%	- Execute a basic SELECT statement - List the capabilities of SQL SELECT statements - Differentiate between SQL statements and SQL*Plus commands
Working with Oracle Database SQL	8%	- Start up and shut down a database - Describe the Oracle Database architecture - Create a container database - Explain the installation of Oracle Database software
Reporting Aggregated Data Using Group Functions	15%	- Include or exclude grouped rows by using the HAVING clause - Group data by using the GROUP BY clause - Identify the available group functions - Describe the use of group functions
Using DDL Statements to Create and Manage Tables	14%	- Describe the data types that are available for columns - Review the table structure - Categorize the main database objects - Alter table definitions - Drop, rename, and truncate tables - Create a simple table
Restricting and Sorting Data	6%	- Use ampersand substitution to restrict and sort output at runtime - Use DEFINE and UNDEFINE commands - Sort the rows that are retrieved by a query - Limit the rows that are retrieved by a query
Using Single-Row Functions to Customize Output	10%	- Manipulate numbers with the ROUND, TRUNC, and MOD functions - Describe the differences between single-row and multiple-row functions - Manipulate strings with character function in the SELECT and WHERE clauses - Manipulate dates with the date functions - Perform arithmetic with date data
Using Conversion Functions and Conditional Expressions	10%	- Use conditional IF THEN ELSE logic in a SELECT statement - Apply the NVL, NULLIF, and COALESCE functions to data - Describe implicit and explicit data type conversion - Use the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions
Using Set Operators	5%	- Use a set operator to combine multiple queries into a single query - Describe set operators - Describe the order of precedence when the set operators are used

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Oracle Database SQL Sample Questions (Q37-Q42):

NEW QUESTION # 37
You must find the number of employees whose salary is lower than employee 110.
Which statement fails to do this?

A. SELECT COUNT (* )
FROM employees
WHERE salary < (SELECT salary FROM employees WHERE employee_id =
110) ;
B. SELECT COUNT (* )
FROM employees e
WHERE e. salary < (SELECT a. salary FROM employees a WHERE e. employee_id = 110);
C. SELECT COUNT (*)
FROM employees e
JOIN (SELECT salary FROM employees WHERE employee_id= 110) a
ON e. salary< a. salary;
D. SELECT COUNT (*)
FROM employees
JOIN employees a
ON e. salary< a. salary
WHERE a. employee_id= 110;

Answer: B

Explanation:
In this context, the correct answers will provide a count of employees with a salary less than that of employee with ID 110. Let's evaluate the provided statements:
A: This statement is incorrect due to a syntax error; it uses alias 'e' without defining it, and 'a' is also used incorrectly in the JOIN clause. It should have been written with proper aliases.
B: This statement is correct as it uses a subquery to find the salary of employee ID 110 and compares it to the salaries of all employees to get the count.
C: This statement is also correct as it creates a derived table with the salary of employee ID 110 and compares it with the salaries of the 'employees' table using a JOIN.
D: This is the statement that fails. It is incorrect because the subquery references 'e.employee_id = 110', which will compare the salary of each employee to themselves if their ID is 110, not to the salary of employee 110 for all employees.

NEW QUESTION # 38
Which two statements are true regarding the execution of the correlated subqueries? (Choose two.)

A. The outer query executes only once for the result returned by the inner query.
B. Each row returned by the outer query is evaluated for the results returned by the inner query.
C. The nested query executes first and then the outer query executes.
D. The nested query executes after the outer query returns the row.

Answer: B,D

NEW QUESTION # 39
Evaluate the following query

What is the correct output of the above query?

A. +00-300, +00-650, +00 11:12:10.123457
B. +25-00, +54-02, +00 11:12:10.123457
C. +25-00, +00-650, +00 11:12:10.123457
D. +00-300, +54-02, +00 11:12:10.123457

Answer: B

NEW QUESTION # 40
The ORDERS table has a column ORDER_DATE of date type DATE The default display format for a date is DD-MON-RR Which two WHERE conditions demonstrate the correct usage of conversion functions?

A. WHERE TO_CHAR(order_date,'MON DD YYYY') ='JAN 20 2019';
B. WHERE order_date> TO_DATE(ADD_MONTHS(SYSDATE,6),'MON DD YYYY');
C. WHERE order_date IN (TO_DATE ('Oct 21 2018','MON DD YYYY'), TO_CHAR('Nov 21 2018','MON DD YYYY'));
D. WHERE order_date> TO_DATE('JUL 10 2018','MON DD YYYY');
E. WHERE ordet_date> TO_CHAR(ADD_MONTHS(SYSDATE, 6),'MON DD YYYY')

Answer: A,D

NEW QUESTION # 41
Which three are true?

A. ADD_MONTHS works with a character string that can be implicitlyt converted to a DATE data type.
B. CEIL returns the largest integer less than or equal to a specified number.
C. LAST_DAY returns the date of the last day of the month for the date argument passed to the function.
D. LAST_DAY returns the date of the last day of the current ,month onlyu.
E. CEIL requires an argument which is a numeric data type.
F. LAST_DAY return the date of the last day the previous month only.
G. ADD_MONTHS adds a number of calendar months to a date.

Answer: C,E,G

NEW QUESTION # 42
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