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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q138-Q143):

NEW QUESTION # 138
Which three statements are true about views in an Oracle database?

A. The WITH CHECK clause prevents certain rows from being displayed when querying the view.
B. The WITH CHECK clause prevents certain rows from being updated or inserted.
C. Deleting one or more rows using a view whose defining query contains a GROUP BY clause will cause an error.
D. Inserting one or more rows using a view whose defining query contains a GROUP BY clause will cause an error.
E. Tables in the defining query of a view must always exist in order to create the view.
F. Date Manipulation Language (DML) can always be used on views.
G. Views can be updated without the need to re-grant privileges on the view.

Answer: B,C,D

Explanation:
For question 138 regarding Oracle views, the correct answers are B, E, and G:
B . The WITH CHECK OPTION clause prevents certain rows from being updated or inserted: This clause ensures that all data modifications performed through the view result in data that conforms to the view's defining query.
E . Deleting one or more rows using a view whose defining query contains a GROUP BY clause will cause an error: Views that involve aggregate functions, GROUP BY clauses, or DISTINCT cannot be directly modified with DML operations such as DELETE, because the underlying data manipulation would be ambiguous.
G . Inserting one or more rows using a view whose defining query contains a GROUP BY clause will cause an error: Similarly to DELETE, INSERT operations into a view that uses a GROUP BY clause are generally not allowed because it's unclear how the new rows should be aggregated into the existing groups.
Other options are incorrect because:
A: The WITH CHECK OPTION clause does not prevent rows from being displayed; it restricts DML operations.
C: Views can be created with non-existent underlying tables or views using the FORCE option in Oracle.
D: Not all views are updatable, especially those involving joins, group functions, or distinct aggregation.
F: Updating a view does not impact the granted privileges unless the definition of the view changes.

NEW QUESTION # 139
View the exhibit and examine the structure of the EMPLOYEES table.

You want to display all employees and their managers having 100 as the MANAGER_ID.
You want the output in two columns: the first column would have the LAST_NAME of the managers and the second column would have LAST_NAME of the employees.
Which SQL statement would you execute?

A. SELECT m.last_name "Manager", e.last_name "Employee"FROM employees m JOIN employees eON m.employee_id = e.manager_idWHERE e.manager_id = 100;
B. SELECT m.last_name "Manager", e.last_name "Employee"FROM employees m JOIN employees eON m.employee_id = e.manager_idWHERE m.manager_id = 100;
C. SELECT m.last_name "Manager", e.last_name "Employee"FROM employees m JOIN employees eON e.employee_id = m.manager_idWHERE m.manager_id = 100;
D. SELECT m.last_name "Manager", e.last_name "Employee"FROM employees m JOIN employees eWHERE m.employee_id = e.manager_id and AND e.manager_id = 100

Answer: A

NEW QUESTION # 140
View the Exhibits and examine PRODUCTS and SALES tables.

You issue the following query to display produce name and the number of times the product has been sold:
SQL>SLECT p. PROD_name, i . item _cnt
FROM (SELECT prod_id =, count (*) item_cnt
FROMm sales
GROUP BY prod_id) I RIGHT OUTER JION products p
On i. prod _id =.prod_id;
What happens when the above statement is executed?

A. The statement produce an error because a subquery in the FROM clause and outer-jions cannot be together.
B. the statement executes successfully and produces the required output.
C. The statement produces an error ITEM_CNT cannot be displayed in the outer query.
D. The statement produces an error because the GROUP By clause cannot be usesd in a subquery in the FROM clause.

Answer: B

NEW QUESTION # 141
Evaluate the following SQL statement:
SQL> select cust_id, cust_last_name "Last name"
FROM customers
WHERE country_id = 10
UNION
SELECT cust_id CUST_NO, cust_last_name
FROM customers
WHERE country_id = 30
Identify three ORDER BY clauses either one of which can complete the query.

A. ORDER BY 2, cust_id
B. ORDER BY 2, 1
C. ORDER BY "CUST_NO"
D. ORDER BY CUST_NO
E. ORDER BY "Last name"

Answer: A,B,E

Explanation:
Explanation
Using the ORDER BY Clause in Set Operations
-The ORDER BY clause can appear only once at the end of the compound query.
-Component queries cannot have individual ORDER BY clauses.
-The ORDER BY clause recognizes only the columns of the first SELECT query.
-By default, the first column of the first SELECT query is used to sort the output in an ascending order.

NEW QUESTION # 142
Evaluate the following SQL statement:

Which statement is true regarding the outcome of the above query?

A. It produces an error because positional notation cannot be used in the ORDER BY clause with SET operators.
B. It produces an error because the ORDER BY clause should appear only at the end of a compound query-that is, with the last SELECT statement.
C. It executes successfully but ignores the ORDER BY clause because it is not located at the end of the compound statement.
D. It executes successfully and displays rows in the descending order of PROMO_CATEGORY.

Answer: B

NEW QUESTION # 143
......

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