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Oracle 1z0-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q304-Q309):

NEW QUESTION # 304
Examine the description of the MEMBERS table;
SELECT city,last_name LNAME FROM members ...
You want to display all cities that contain the string AN. The cities must be returned in ascending order, with the last names further sorted in descending order.
Which two clauses must you add to the query?

A. ORDER BY last_name DESC,city ASC
B. WHERE city IN ('%AN%')
C. WHERE city LIKE '%AN%;
D. ORDER BY 1,2.
E. CORADER BY 1, LNAME DESC
F. WHERE city='%AN%;

Answer: C,E

Explanation:
To achieve the desired output for the query from the MEMBERS table:
* C. ORDER BY 1, LNAME DESC: This clause correctly sorts the results first by the first column (city) in ascending order by default, and then by the alias LNAME (last_name) in descending order.
* E. WHERE city LIKE '%AN%': This clause correctly filters the rows to include only those cities containing the string 'AN' anywhere in the city name, using the LIKE operator which is suitable for pattern matching.
Incorrect options:
* A: This would order both columns in ascending order, which does not meet the requirement for last_name to be in descending order.
* B: This misplaces the order priorities and uses explicit column names that contradict the sorting requirement specified.
* D: Incorrect syntax for a LIKE clause; equality operator cannot be used with wildcards.
* F: The IN operator is incorrectly used here with a pattern, which is not valid syntax.

NEW QUESTION # 305
Which three statements about roles are true?

A. A single role can be assigned to multiple users.
B. A role is a named group of related privileges that can only be assigned to a user.
C. Roles are assigned to users using the ALTER USER statement.
D. Roles are assigned to roles using the ALTER ROLE statement.
E. A single user can be assigned multiple roles.
F. Privileges are assigned to a role using the GRANT statement.
G. Privileges are assigned to a role using the ALTER ROLE statement.

Answer: A,E,F

Explanation:
Roles in Oracle Database are designed to simplify the management of privileges. The following statements about roles are true:
B: A single user can indeed be assigned multiple roles. This allows for easy management of user privileges as they can be grouped into roles, and these roles can be granted to users.
D: A single role can be assigned to multiple users. This is one of the primary purposes of roles, to provide an efficient way to grant the same set of privileges to different users.
G: Privileges are granted to a role using the GRANT statement. This allows the role to encapsulate the privileges which can then be granted to users.
The incorrect options are:
A: Roles cannot be assigned to other roles using the ALTER ROLE statement; they are granted to other roles using the GRANT statement.
C: Roles are not assigned to users using the ALTER USER statement; roles are granted to users using the GRANT statement.
E: Privileges are not assigned to a role using the ALTER ROLE statement; they are granted using the GRANT statement.
F: A role is not limited to being assigned to just one user; it can be assigned to multiple users.
Reference:
Oracle Documentation on Roles: Database Security Guide - Roles
Oracle Documentation on the GRANT statement: SQL Language Reference - GRANT

NEW QUESTION # 306
Which two statements are true about external tables?

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

Answer: B,E

Explanation:
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.

NEW QUESTION # 307
Which two statements are true regarding single row functions? (Choose two.)

A. TRIM : can be used to remove all the occurrences of a character from a string.
B. MOD : returns the quotient of a division.
C. CONCAT : can be used to combine any number of values.
D. INSTR : can be used to find only the first occurrence of a character in a string.
E. SYSDATE : returns the database server current date and time.
F. TRUNC : can be used with NUMBER and DATE values.

Answer: E,F

Explanation:
Explanation

NEW QUESTION # 308
View the Exhibit and examine the structure of ORDERS and ORDER_ITEMS tables.
ORDER__ID is the primary key in the ORDERS table. It is also the foreign key in the ORDER_ITEMS table wherein it is created with the ON DELETE CASCADE option.

Which DELETE statement would execute successfully?

A. DELETE order_id
FROM orders
WHERE order_total < 1000;
B. DELETE orders
WHERE order_total < 1000;
C. DELETE
FROM orders
WHERE (SELECT order_id
FROM order_items);
D. DELETE orders o, order_items i
WHERE o.order id = i.order id;

Answer: B

NEW QUESTION # 309
......

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