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Oracle 1z0-071 Exam Syllabus Topics:

Section	Weight	Objectives
Restricting and Sorting Data	15%	- WHERE clause and filtering conditions - ORDER BY clause and sorting rules - Substitution variables, DEFINE and VERIFY commands - Operator precedence
Retrieving Data Using SQL SELECT Statement	20%	- SELECT statement syntax and usage - Arithmetic operations and NULL handling - Column aliases, concatenation, literals and DISTINCT
Managing Indexes, Synonyms and Sequences		- Create and maintain indexes - Create and use synonyms - Create and use sequences
Relational Database Concepts	10%	- Relationship between database and SQL - ERD and SQL statement mapping - Theoretical and physical aspects of relational databases
Conversion Functions and Conditional Expressions	10%	- Implicit and explicit data type conversion - NVL, NULLIF, COALESCE and CASE expressions - TO_CHAR, TO_NUMBER, TO_DATE functions
Managing Tables and Constraints		- Temporary and external tables - Constraints: primary key, foreign key, unique, check, not null - Data types, creating/altering/dropping tables
Managing Views		- Updatable and read-only views - Create, modify and drop views
Working with Time Zones and Date/Time Data		- TIMESTAMP, INTERVAL data types - Time zone conversion functions
Manipulating Data and Managing Transactions		- Transaction control: COMMIT, ROLLBACK, SAVEPOINT - Multi-table inserts - INSERT, UPDATE, DELETE, MERGE statements
Using SET Operators		- UNION, UNION ALL, INTERSECT, MINUS operators - Ordering results with set operations
Using Data Dictionary Views		- Retrieve metadata and object information
Using Subqueries to Solve Queries		- Single-row and multi-row subqueries - Correlated subqueries for update/delete
Controlling User Access		- System and object privileges - Roles, granting and revoking privileges
Aggregating Data Using Group Functions	10%	- GROUP BY and HAVING clauses - SUM, AVG, COUNT, MAX, MIN functions - Handling NULLs in group functions
Using Single-Row Functions to Customize Output	20%	- Nested functions usage - Character, number, and date functions
Displaying Data from Multiple Tables	15%	- Equijoins and non-equijoins - Cartesian products - Self-joins and outer joins

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1z0-071 Zertifizierungsfragen - 1z0-071 Probesfragen

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Oracle Database SQL 1z0-071 Prüfungsfragen mit Lösungen (Q83-Q88):

83. Frage
The SQL statements executed in a user session are as follows:

Which two statements describe the consequences of issuing the ROLLBACK TO SAVE POINT a command in the session? (Choose two.)

A. No SQL statements are rolled back.
B. Both the DELETE statements and the UPDATE statement are rolled back.
C. The rollback generates an error.
D. Only the DELETE statements are rolled back.
E. Only the second DELETE statement is rolled back.

Antwort: A,C

84. Frage
Examine the description of the EMPLOYEES table:

Which two queries return the highest salary in the table?

A. SELECT MAX (salary)
FROM employees
GROUP BY department_id;
B. SELECT MAX (salary)
FROM employees
GROUP BY department_id
HAVING MAX (salary) = MAX (MAX (salary));
C. SELECT MAX (MAX (salary))
FROM employees
GROUP BY department_id;
D. SELECT department_id, MAX(salary)
FROM employees
GROUP BY department_id;
E. SELECT MAX (salary)
FROM employees;

Antwort: C,E

85. Frage
Which two statements are true about external tables?

A. You can populate them from existing data in the database by using the CREATE TABLE AS SELECT command.
B. DML statements cannot be used on them.
C. Their data can be retrieved by using only SQL or PL/SQL.
D. Indexes can be created on them.
E. Their metadata and actual data are both stored outside the database.

Antwort: B,C

Begründung:
For external tables in Oracle:
* C. DML statements cannot be used on them: External tables are read-only in Oracle. They allow access to data in external sources as if it were within a table in the database, but they do not support DML operations (INSERT, UPDATE, DELETE).
* D. Their data can be retrieved by using only SQL or PL/SQL: You can query the data in external tables using SQL or PL/SQL, just as you would with regular database tables.
Incorrect options are:
* A: You cannot create indexes directly on external tables.
* B: External tables cannot be populated using the CREATE TABLE AS SELECT command since they are primarily meant for accessing data stored outside the database.
* E: Only the metadata of an external tables is stored in the database; the actual data remains in external files.

86. Frage
View the Exhibit and examine the structure in the DEPARTMENTS tables. (Choose two.)

Examine this SQL statement:
SELECT department_id "DEPT_ID", department_name, 'b' FROM
departments
WHERE departments_id=90
UNION
SELECT department_id, department_name DEPT_NAME, 'a' FROM
departments
WHERE department_id=10
Which two ORDER BY clauses can be used to sort the output?

A. ORDER BY 'b';
B. ORDER BY DEPT_ID;
C. ORDER BY DEPT_NAME;
D. ORDER BY 3;

Antwort: B,D

87. Frage
MANAGER is an existing role with no privileges or roles.
EMP is an existing role containing the CREATE TABLE privilege.
EMPLOYEES is an existing table in the HR schema.
Which two commands execute successfully?

A. GRANT CREATE TABLE, SELECT ON hr. employees TO manager;
B. GRANT CREATE TABLE, emp TO manager;
C. GRANT SELECT, INSERT ON hr.employees TO manager WITH GRANT OPTION:
D. GRANT CREATE ANY SESSION, CREATE ANY TABLE TO manager;
E. GRANT CREATE SEQUENCE TO manager, emp;

Antwort: D,E

Begründung:
In Oracle SQL, roles can be granted privileges and other roles, and these privileges can then be passed on to users.
* Statement A is correct: GRANT CREATE SEQUENCE TO manager, emp; successfully grants the CREATE SEQUENCE privilege to both the manager and emp roles.
* Statement E is correct: GRANT CREATE ANY SESSION, CREATE ANY TABLE TO manager; successfully grants two system privileges to the manager role.
* Statements B, C, and D are incorrect for the following reasons:
* B is incorrect because the correct syntax to grant object privileges includes separating privileges with commas, not spaces, and the object name should be in singular form (hr.employees).
* C is incorrect because you cannot grant a role and a privilege in the same statement.
* D is incorrect because the correct syntax for granting object privileges does not include the privilege CREATE TABLE before specifying the object (hr.employees).

88. Frage
......

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