Oracle 1z0-071 Dumps-Effective Tips To Pass [2026]

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Oracle 1z0-071 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Using Data Dictionary Views		- Retrieve metadata and object information
Topic 2: Working with Time Zones and Date/Time Data		- TIMESTAMP, INTERVAL data types - Time zone conversion functions
Topic 3: Managing Indexes, Synonyms and Sequences		- Create and use sequences - Create and maintain indexes - Create and use synonyms
Topic 4: Using Single-Row Functions to Customize Output	20%	- Nested functions usage - Character, number, and date functions
Topic 5: Displaying Data from Multiple Tables	15%	- Equijoins and non-equijoins - Self-joins and outer joins - Cartesian products
Topic 6: Conversion Functions and Conditional Expressions	10%	- NVL, NULLIF, COALESCE and CASE expressions - Implicit and explicit data type conversion - TO_CHAR, TO_NUMBER, TO_DATE functions
Topic 7: Aggregating Data Using Group Functions	10%	- SUM, AVG, COUNT, MAX, MIN functions - GROUP BY and HAVING clauses - Handling NULLs in group functions
Topic 8: Using SET Operators		- UNION, UNION ALL, INTERSECT, MINUS operators - Ordering results with set operations
Topic 9: Controlling User Access		- Roles, granting and revoking privileges - System and object privileges
Topic 10: Using Subqueries to Solve Queries		- Single-row and multi-row subqueries - Correlated subqueries for update/delete
Topic 11: Manipulating Data and Managing Transactions		- INSERT, UPDATE, DELETE, MERGE statements - Transaction control: COMMIT, ROLLBACK, SAVEPOINT - Multi-table inserts
Topic 12: Managing Tables and Constraints		- Temporary and external tables - Data types, creating/altering/dropping tables - Constraints: primary key, foreign key, unique, check, not null
Topic 13: Retrieving Data Using SQL SELECT Statement	20%	- SELECT statement syntax and usage - Column aliases, concatenation, literals and DISTINCT - Arithmetic operations and NULL handling
Topic 14: Managing Views		- Create, modify and drop views - Updatable and read-only views
Topic 15: Restricting and Sorting Data	15%	- WHERE clause and filtering conditions - Operator precedence - Substitution variables, DEFINE and VERIFY commands - ORDER BY clause and sorting rules
Topic 16: Relational Database Concepts	10%	- Theoretical and physical aspects of relational databases - ERD and SQL statement mapping - Relationship between database and SQL

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Oracle Database SQL Sample Questions (Q42-Q47):

NEW QUESTION # 42
Which two statements are true about * _ TABLES views?

A. All users can query DBA TABLES successfully.
B. ALL TABLES displays all tables owned by the current user.
C. You must have SELECT privileges on a table to view it in USER TABLES.
D. You must have SELECT privileges on a table to view it in ALL _TABLES.
E. You must have SELECT privileges on a table to view it in DBA TABLES.
F. USER_ TABLES displays all tables owned by the current user.

Answer: A,F

Explanation:
Understanding Oracle's data dictionary views is crucial for database management:
Option C: USER_TABLES displays all tables owned by the current user.
USER_TABLES is a view that shows all tables owned by the user executing the query.
Option F: All users can query DBA_TABLES successfully.
While all users can attempt to query DBA_TABLES, only users with the appropriate privileges can retrieve information from it. This option is tricky; "querying" is possible for all, but "retrieving data" depends on privileges.
Options A, B, D, and E are not entirely correct:
Option A and Option E are incorrect because USER_TABLES shows tables regardless of SELECT privileges.
Option B is incorrect; one does not need SELECT privileges on each table to view them in DBA_TABLES, but they need appropriate system privileges to access DBA_TABLES.
Option D is incorrect as ALL_TABLES displays tables accessible to the current user, not just owned by them.

NEW QUESTION # 43
Examine the commands used to create DEPARTMENT_DETAILSand COURSE_DETAILS tables:

You want to generate a list of all department IDs along with any course IDs that may have been assigned to them.
Which SQL statement must you use?
SELECT d.department_id, c.course_id FROM department_details d RIGHT OUTER

A. JOIN course_details c ON (d.department_id=c. department_id);
SELECT d.department_id, c.course_id FROM department_details d LEFT OUTER
B. department_details d ON (c.department_id=d. department_id);
SELECT d.department_id, c.course_id FROM department_details d RIGHT OUTER
C. JOIN course_details c ON (c.department_id=d. department_id);
D. JOIN course_details c ON (d.department_id=c. department_id);
SELECT d.department_id, c.course_id FROM course_details c LEFT OUTER JOIN

Answer: D

NEW QUESTION # 44
Which two are true about dropping columns from a table?

A. A column drop is implicitly committed.
B. A primary key column cannot be dropped.
C. A column that is referenced by another column in any other table cannot be dropped.
D. A column can be removed only if it contains no data.
E. Multiple columns can be dropped simultaneously using the ALTER TABLE command.
F. A column must be set as unused before it is dropped from a table.

Answer: B,E

NEW QUESTION # 45
These are the steps for a correlated subquery, listed in random order:
1. The WHEREclause of the outer query is evaluated.
2. A candidate row is fetched from the table specified in the outer query.
3. This is repeated for the subsequent rows of the table, until all the rows are processed.
4. Rows are returned by the inner query, after being evaluated with the value from the candidate row in the outer query.
Which is the correct sequence in which the Oracle server evaluates a correlated subquery?

A. 4, 2, 1, 3
B. 4, 1, 2, 3
C. 2, 1, 4, 3
D. 2, 4, 1, 3

Answer: D

Explanation:
Explanation/Reference:
References:
http://rajanimohanty.blogspot.co.uk/2014/01/correlated-subquery.html

NEW QUESTION # 46
Examine the structure of the ORDERS table:

You want to find the total value of all the orders for each year and issue this command:
SQL> SELECT TO_CHAR(order_date,'rr'), SUM(order_total) FROM orders
GROUP BY TO_CHAR(order_date, 'yyyy');
Which statement is true regarding the result? (Choose the best answer.)

A. It return an error because the datatype conversion in the SELECT list does not match the data type conversion in the GROUP BY clause.
B. It executes successfully but does not give the correct output.
C. It executes successfully and gives the correct output.
D. It returns an error because the TO_CHAR function is not valid.

Answer: A

NEW QUESTION # 47
......

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