1z1-071 Unterlagen mit echte Prüfungsfragen der Oracle Zertifizierung

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Oracle 1z1-071 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Restricting and Sorting Data	6%	- Use ampersand substitution to restrict and sort output at runtime - Sort the rows that are retrieved by a query - Limit the rows that are retrieved by a query - Use DEFINE and UNDEFINE commands
Topic 2: Manipulating Data	14%	- Describe each data manipulation language (DML) statement - Insert rows into a table - Update rows in a table - Control transactions - Delete rows from a table
Topic 3: Reporting Aggregated Data Using Group Functions	15%	- Group data by using the GROUP BY clause - Identify the available group functions - Include or exclude grouped rows by using the HAVING clause - Describe the use of group functions
Topic 4: Using DDL Statements to Create and Manage Tables	14%	- Review the table structure - Alter table definitions - Describe the data types that are available for columns - Drop, rename, and truncate tables - Create a simple table - Categorize the main database objects
Topic 5: Using Conversion Functions and Conditional Expressions	10%	- 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 - Use conditional IF THEN ELSE logic in a SELECT statement
Topic 6: Using Single-Row Functions to Customize Output	10%	- Perform arithmetic with date data - Manipulate numbers with the ROUND, TRUNC, and MOD functions - Manipulate dates with the date functions - Manipulate strings with character function in the SELECT and WHERE clauses - Describe the differences between single-row and multiple-row functions
Topic 7: 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 8: Using Set Operators	5%	- Use a set operator to combine multiple queries into a single query - Describe the order of precedence when the set operators are used - Describe set operators
Topic 9: Using Subqueries to Solve Queries	15%	- List the types of subqueries - Define subqueries - Write single-row and multi-row subqueries - Describe the types of problems that subqueries can solve
Topic 10: Working with Oracle Database SQL	8%	- Create a container database - Explain the installation of Oracle Database software - Describe the Oracle Database architecture - Start up and shut down a database
Topic 11: Displaying Data from Multiple Tables Using Joins	15%	- 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 - Join a table to itself by using a self-join
Topic 12: 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 13: 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

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Oracle 1z1-071 Prüfung Übungen und Antworten

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Oracle Database SQL 1z1-071 Prüfungsfragen mit Lösungen (Q137-Q142):

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

You want to generate a report showing the last names and credit limits of all customers whose last names start with A, B, or C, and credit limit is below 10,000.
Evaluate the following two queries:
SQL> SELECT cust_last_name, cust_credit_limit FROM customers
WHERE (UPPER(cust_last_name) LIKE 'A%' OR
UPPER (cust_last_name) LIKE 'B%' OR UPPER (cust_last_name) LIKE 'C%')
AND cust_credit_limit < 10000;
SQL>SELECT cust_last_name, cust_credit_limit FROM customers
WHERE UPPER (cust_last_name) BETWEEN 'A' AND 'C'
AND cust_credit_limit < 10000;
Which statement is true regarding the execution of the above queries?

A. Only the second query gives the correct result
B. Both execute successfully and give the same result
C. Only the first query gives the correct result
D. Both execute successfully but do not give the required result

Antwort: C

138. Frage
Examine the structure of the MEMBERS table:

Examine the SQL statement:
SQL > SELECT city, last_name LNAME FROM MEMBERS ORDER BY 1, LNAME DESC; What would be the result execution? (Choose the best answer.)

A. It fails because a column number and a column alias cannot be used together in the ORDER BY clause.
B. It fails because a column alias cannot be used in the ORDER BY clause.
C. It displays all cities in ascending order, within which the last names are further sorted in descending order.
D. It displays all cities in descending order, within which the last names are further sorted in descending order.

Antwort: C

139. Frage
View the Exhibit and examine the description of the PRODUCT_INFORMATION table. Which SQL statement would retrieve from the table the number of products having
LIST_PRICE as NULL?

A. SELECT COUNT(list_price)
FROM product_information
WHERE list_price = NULL;
B. SELECT COUNT(NVL(list_price, 0))
FROM product_information
WHERE list_price IS NULL;
C. SELECT COUNT(list_price)
FROM product_information
WHERE list_price IS NULL;
D. SELECT COUNT(DISTINCT list_price)
FROM product_information
WHERE list_price IS NULL;

Antwort: B

140. Frage
View the exhibit and examine the description of the DEPARTMENTSand EMPLOYEEStables.

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 JOINclause is missing the USINGclause.
B. The DEPARTMENTStable is not used before the EMPLOYEEStable in the FROMclause.
C. The EMPLOYEESand DEPARTMENTStables have more than one column with the same column name and data type.
D. The table prefix is missing for the column names in the SELECTclause.

Antwort: C

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

141. Frage
Which statement is true about SQL query processing in an Oracle database instance? (Choose the best answer.)

A. During optimization, execution plans are formulated based on the statistics gathered by the database instance, and the lowest cost plan is selected for execution.
B. During executing, the oracle server may read data from storage if the required data is not already in memory.
C. During row source generation, rows that satisfy the query are retrieved from the database and stored in memory.
D. During parsing, a SQL statement containing literals in the WHERE clause that has been executed by any session and which is cached in memory, is always reused for the current execution.

Antwort: B

142. Frage
......

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