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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL 1z1-071 Prüfungsfragen mit Lösungen (Q216-Q221):

216. Frage
View the Exhibit and examine the structure of the CUSTOMERS table.

CUSTOMER_VU is a view based on CUSTOMERS_BR1 table which has the same structure as CUSTOMERS table.
CUSTOMERS need to be updated to reflect the latest information about the customers.
What is the error in the following MERGE statement?

A. CUSTOMER_VU cannot be used as a data source.
B. The WHERE clause cannot be used with INSERT.
C. The INTO clause is misplaced in the command.
D. The CUSTOMER_ID column cannot be updated.

Antwort: D

217. Frage
View the Exhibit and examine the structure of the ORDERS table.

You must select ORDER_ID and ORDER_DATE for all orders that were placed after the last order placed by CUSTOMER_ID 101.
Which query would give you the desired result?

A. SELECT order_id, order_date FROM orders
WHERE order_date > IN
(SELECT order_date FROM orders WHERE customer_id = 101);
B. SELECT order_id, order_date FROM orders
WHERE order_date > ALL
(SELECT MAX(order_date) FROM orders ) AND customer_id = 101;
C. SELECT order_id, order_date FROM orders
WHERE order_date > ALL
(SELECT order_date FROM orders WHERE customer_id = 101);
D. SELECT order_id, order_date FROM orders
WHERE order_date >
ANY
(SELECT order_date FROM orders WHERE customer_id = 101);

Antwort: C

218. Frage
View the Exhibit and examine the structure of the CUSTOMERS and CUST_HISTORY tables.

The CUSTOMERS table contains the current location of all currently active customers.
The CUST_HISTORY table stores historical details relating to any changes in the location of all current as well as previous customers who are no longer active with the company.
You need to find those customers who have never changed their address.
Which SET operator would you use to get the required output?

A. UNION
B. MINUS
C. INTERSECT
D. UNION ALL

Antwort: B

219. Frage
View the exhibit and examine the data in ORDERS_MASTERand MONTHLY_ORDERStables.

Evaluate the following MERGEstatement:
MERGE_INTO orders_master o
USING monthly_orders m
ON (o.order_id = m.order_id)
WHEN MATCHED THEN
UPDATE SET o.order_total = m.order_total
DELETE WHERE (m.order_total IS NULL)
WHEN NOT MATCHED THEN
INSERT VALUES (m.order_id, m.order_total)
What would be the outcome of the above statement?

A. The ORDERS_MASTERtable would contain the ORDER_IDs1 and 2.
B. The ORDERS_MASTERtable would contain the ORDER_IDs1, 2 and 4.
C. The ORDERS_MASTERtable would contain the ORDER_IDs1, 2 and 3.
D. The ORDERS_MASTERtable would contain the ORDER_IDs1, 2, 3 and 4.

Antwort: B

Begründung:
Explanation/Reference:
References:
https://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_9016.htm

220. Frage
Which three queries execute successfully?

A. SELECT 1 - SYSDATE- DATE '2019-01-01' FROM DUAL;
B. SELECT 1 / SYSDATE - DATE '2019-01-01' FROM DUAL;
C. SELECT SYSDATE / DATE '2019-01-01' - 1 FROM DUAL
D. SELECT SYSDATE - DATE '2019-01-01' - 1 FROM DUAL;
E. SELECT (SYSDATE-DATE '2019-01-01') / 1 FROM DUAL;
F. SELECT SYSDATE - 1 - DATE'2019-01-01' EROM DUAL;

Antwort: D,E,F

Begründung:
In Oracle SQL, date arithmetic can be performed directly, subtracting one date from another to get the number of days between them:
* Option A:
* SELECT (SYSDATE - DATE '2019-01-01') / 1 FROM DUAL; This query successfully calculates the difference between the current date and a specific date.
* Option D:
* SELECT SYSDATE - DATE '2019-01-01' - 1 FROM DUAL; This query subtracts a specific date from the current date and then subtracts 1 more day, which will execute successfully.
* Option F:
* SELECT SYSDATE - 1 - DATE '2019-01-01' FROM DUAL; Similar to D, this will successfully compute the date difference minus one day.
Options B, C, and E are incorrect because:
* Option B and Option C: You cannot divide by a date or divide a date by a number.
* Option E: You cannot subtract a date from a number.

221. Frage
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