Exam Name: Oracle Database SQL
Certification Provider: Oracle
Corresponding Certification: Oracle PL/SQL Developer Certified Associate
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Oracle 1z0-071 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Retrieving Data Using SQL SELECT Statement | 20% | - Arithmetic operations and NULL handling - Column aliases, concatenation, literals and DISTINCT - SELECT statement syntax and usage |
| Topic 2: Working with Time Zones and Date/Time Data | - TIMESTAMP, INTERVAL data types - Time zone conversion functions | |
| Topic 3: Using Subqueries to Solve Queries | - Correlated subqueries for update/delete - Single-row and multi-row subqueries | |
| Topic 4: Conversion Functions and Conditional Expressions | 10% | - Implicit and explicit data type conversion - TO_CHAR, TO_NUMBER, TO_DATE functions - NVL, NULLIF, COALESCE and CASE expressions |
| Topic 5: Restricting and Sorting Data | 15% | - ORDER BY clause and sorting rules - Substitution variables, DEFINE and VERIFY commands - WHERE clause and filtering conditions - Operator precedence |
| Topic 6: Controlling User Access | - System and object privileges - Roles, granting and revoking privileges | |
| Topic 7: Managing Indexes, Synonyms and Sequences | - Create and maintain indexes - Create and use sequences - Create and use synonyms | |
| Topic 8: Using Data Dictionary Views | - Retrieve metadata and object information | |
| Topic 9: Manipulating Data and Managing Transactions | - INSERT, UPDATE, DELETE, MERGE statements - Transaction control: COMMIT, ROLLBACK, SAVEPOINT - Multi-table inserts | |
| Topic 10: Aggregating Data Using Group Functions | 10% | - Handling NULLs in group functions - SUM, AVG, COUNT, MAX, MIN functions - GROUP BY and HAVING clauses |
| Topic 11: Managing Tables and Constraints | - Temporary and external tables - Constraints: primary key, foreign key, unique, check, not null - Data types, creating/altering/dropping tables | |
| Topic 12: Relational Database Concepts | 10% | - ERD and SQL statement mapping - Relationship between database and SQL - Theoretical and physical aspects of relational databases |
| Topic 13: Using Single-Row Functions to Customize Output | 20% | - Nested functions usage - Character, number, and date functions |
| Topic 14: Managing Views | - Create, modify and drop views - Updatable and read-only views | |
| Topic 15: Displaying Data from Multiple Tables | 15% | - Cartesian products - Self-joins and outer joins - Equijoins and non-equijoins |
| Topic 16: Using SET Operators | - Ordering results with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
Oracle Database SQL Sample Questions:
Examine the structure of the employees table.
There is a parent/child relationship between EMPLOYEE_Id and MANAGER_ID.
You want to display the last names and manager IDs of employees who work for the same manager asthe employee whose EMPLOYEE_ID is 123.
Which query provides the correct output?
- A. SELECT e.last_name, m.manager_id
FROM employees e RIGHT OUTER JOIN employees m
on (e.manager_id = m.employee_id)
AND e.employee_id = 123; - B. SELECT e.last_name, m.manager_id
FROM employees e RIGHT OUTER JOIN employees m
on (e.employee_id = m.manager_id)
WHERE e.employee_id = 123; - C. SELECT m.last_name, e.manager_id
FROM employees e LEFT OUTER JOIN employees m
on (e.manager_id = m.manager_id)
WHERE e.employee_id = 123; - D. SELECT e.last_name, e.manager_id
FROM employees e RIGHT OUTER JOIN employees m
on (e.employee_id = m.employee_id)
WHERE e.employee_id = 123;
Correct Answer: B 🗳️
View the Exhibit and examine the structure of the EMPLOYEES and JOB_HISTORY tables.
Examine this query which must select the employee IDs of all the employees who have held the job SA_MAN at any time during their employment.
SELECT EMPLOYEE_ID
FROM EMPLOYEES
WHERE JOB_ID = 'SA_MAN'
-------------------------------------
SELECT EMPLOYEE_ID
FROM JOB_HISTORY
WHERE JOB_ID = 'SA_MAN';
Choose two correct SET operators which would cause the query to return the desired result.
- A. UNION ALL
- B. UNION
- C. INTERSECT
- D. MINUS
Correct Answer: A,B 🗳️
View the Exhibit and examine the descriptions of the DEPT and LOCATIOMS tables.
You want to update the CITY column of the DEPT table for all the rows with the corresponding value in the CITY column of the LOCATIONS table for each department.
Which SQL statement would you execute to accomplish the task?
- A. UPDATE dept d
SET city = ALL (SELECT city
FROM locations l
WHERE d.location_id = l.location_id); - B. UPDATE dept d
SET city = ANY (SELECT city FROM locations l); - C. UPDATE dept d
SET city = (SELECT city FROM locations l)
WHERE d.location_id = l.location_id; - D. UPDATE dept d
SET city = (SELECT city
FROM locations l
WHERE d.location_id = l.location_id);
Correct Answer: D 🗳️
You issued the following command:
SQL> DROP TABLE employees;
Which three statements are true?
- A. Sequences used in the employees table become invalid.
- B. All indexes and constraints defined on the table being dropped are also dropped.
- C. The employees table can be recovered using the rollback command.
- D. The employees table is moved to the recycle bin.
- E. The space used by the employees table is reclaimed immediately.
- F. All uncommitted transactions are committed.
Correct Answer: B,D,F 🗳️
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 DEPT_NAME;
- B. ORDER BY 3;
- C. ORDER BY DEPT_ID;
- D. ORDER BY 'b';
Correct Answer: B,C 🗳️
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