Pass Guaranteed Quiz Oracle 1z1-071 - Oracle Database SQL Exam Tutorials

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Oracle 1z1-071 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Manipulating Data	14%	- Delete rows from a table - Update rows in a table - Control transactions - Insert rows into a table - Describe each data manipulation language (DML) statement
Topic 2: Reporting Aggregated Data Using Group Functions	15%	- Identify the available group functions - Group data by using the GROUP BY clause - Describe the use of group functions - Include or exclude grouped rows by using the HAVING clause
Topic 3: Retrieving Data Using the SQL SELECT Statement	5%	- List the capabilities of SQL SELECT statements - Differentiate between SQL statements and SQL*Plus commands - Execute a basic SELECT statement
Topic 4: Displaying Data from Multiple Tables Using Joins	15%	- Cross join tables - View data that does not meet a join condition by using outer joins - Join a table to itself by using a self-join - Write SELECT statements to access data from more than one table using equijoins and non-equijoins
Topic 5: Using DDL Statements to Create and Manage Tables	14%	- Drop, rename, and truncate tables - Review the table structure - Create a simple table - Alter table definitions - Describe the data types that are available for columns - Categorize the main database objects
Topic 6: Using Subqueries to Solve Queries	15%	- Describe the types of problems that subqueries can solve - Define subqueries - Write single-row and multi-row subqueries - List the types of subqueries
Topic 7: Using Conversion Functions and Conditional Expressions	10%	- Describe implicit and explicit data type conversion - Apply the NVL, NULLIF, and COALESCE functions to data - Use conditional IF THEN ELSE logic in a SELECT statement - Use the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions
Topic 8: Controlling User Access	5%	- Distinguish between granting privileges and roles - Differentiate system privileges from object privileges - Grant privileges on tables and on a view
Topic 9: Using Single-Row Functions to Customize Output	10%	- Manipulate numbers with the ROUND, TRUNC, and MOD functions - Manipulate strings with character function in the SELECT and WHERE clauses - Perform arithmetic with date data - Describe the differences between single-row and multiple-row functions - Manipulate dates with the date functions
Topic 10: 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
Topic 11: 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
Topic 12: Using Set Operators	5%	- Describe the order of precedence when the set operators are used - Describe set operators - Use a set operator to combine multiple queries into a single query
Topic 13: Restricting and Sorting Data	6%	- Sort the rows that are retrieved by a query - Use ampersand substitution to restrict and sort output at runtime - Use DEFINE and UNDEFINE commands - Limit the rows that are retrieved by a query

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Oracle Database SQL Sample Questions (Q247-Q252):

NEW QUESTION # 247
Which two statements are true regarding the SQL GROUP BY clause? (Choose two.)

A. If the SELECT clause has an aggregating function, then columns without an aggregating function in the SELECT clause should be included in the GROUP BY clause.
B. You can use a column alias in the GROUP BY clause.
C. Using the WHERE clause after the GROUP BY clause excludes rows after creating groups.
D. Using the WHERE clause before the GROUP BY clause excludes rows before creating groups.
E. The GROUP BY clause is mandatory if you are using an aggregating function in the SELECT clause.

Answer: A,D

NEW QUESTION # 248
View the exhibit and examine the description of the DEPARTMENTS and EMPLOYEES tables.

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 NATURAL JOIN clause is missing the USING clause.
B. The DEPARTMENTS table is not used before the EMPLOYEES table in the FROM clause.
C. The table prefix is missing for the column names in the SELECT clause.
D. The EMPLOYEES and DEPARTMENTS tables have more than one column with the same column name and data type.

Answer: D

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

NEW QUESTION # 249
View the exhibit and examine the structure of the CUSTOMERS table.
Which two tasks would require subqueries or joins to be executed in a single statement?

A. finding the number of customers, in each city, who's marital status is 'married'.
B. finding the average credit limit of male customers residing in 'Tokyo' or 'Sydney'
C. listing of those customers, whose credit limit is the same as the credit limit of customers residing in the city 'Tokyo'.
D. finding the number of customers, in each city, whose credit limit is more than the average credit limit of all the customers
E. listing of customers who do not have a credit limit and were born before 1980

Answer: C,D

NEW QUESTION # 250
Which three queries use valid expressions?

A. SELECT product_id, unit_price, unit_price + surcharge FROM products;
B. SELECT product_id,(expiry_date - delivery_date) * 2 FROM products;
C. SELECT product_id,(unit_price * 0.15 / (4.75 + 552.25)) FROM products;
D. SELECT product_id, expiry_date * 2 from products;
E. SELECT product_id,unit_price,5 "Discount", unit_price + surcharge-discount FROM products;
F. SELECT product_id,unit_price || 5 "Discount" , unit_price + surcharge - discount FROM products;

Answer: A,B,C

NEW QUESTION # 251
Which statement is true about transactions?

A. A set of DDL statements executed in a sequence ending with a COMMIT forms a single transaction.
B. Each Data Definition Language (DDL) statement executed forms a single transaction.
C. A combination of DDL and DML statements executed in a sequence ending with a COMMIT forms a single transaction.
D. A set of Data Manipulation Language (DML) statements executed in a sequence ending with a SAVEPOINT forms a single transaction.

Answer: B

Explanation:
Explanation
https://docs.oracle.com/database/121/CNCPT/transact.htm#CNCPT038

NEW QUESTION # 252
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