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Oracle 1z0-071 Exam Syllabus Topics:

Section	Weight	Objectives
Reporting Aggregated Data Using Group Functions	15%	- Include or exclude grouped rows by using the HAVING clause - Identify the available group functions - Describe the use of group functions - Group data by using the GROUP BY clause
Displaying Data from Multiple Tables Using Joins	15%	- Cross join tables - View data that does not meet a join condition by using outer joins - 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
Creating Other Schema Objects	10%	- Create and maintain indexes - Create, maintain, and use sequences - Create synonyms for database objects - Create, modify, and retrieve data from a view
Retrieving Data Using the SQL SELECT Statement	5%	- Differentiate between SQL statements and SQL*Plus commands - List the capabilities of SQL SELECT statements - Execute a basic SELECT statement
Manipulating Data	14%	- Update rows in a table - Describe each data manipulation language (DML) statement - Insert rows into a table - Control transactions - Delete rows from a table
Using Set Operators	5%	- Describe set operators - Describe the order of precedence when the set operators are used - Use a set operator to combine multiple queries into a single query
Using Conversion Functions and Conditional Expressions	10%	- Use conditional IF THEN ELSE logic in a SELECT statement - Describe implicit and explicit data type conversion - Use the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions - Apply the NVL, NULLIF, and COALESCE functions to data
Restricting and Sorting Data	6%	- Limit the rows that are retrieved by a query - Use DEFINE and UNDEFINE commands - Use ampersand substitution to restrict and sort output at runtime - Sort the rows that are retrieved by a query
Using DDL Statements to Create and Manage Tables	14%	- Categorize the main database objects - Review the table structure - Create a simple table - Describe the data types that are available for columns - Alter table definitions - Drop, rename, and truncate tables
Controlling User Access	5%	- Distinguish between granting privileges and roles - Grant privileges on tables and on a view - Differentiate system privileges from object privileges
Working with Oracle Database SQL	8%	- Create a container database - Start up and shut down a database - Explain the installation of Oracle Database software - Describe the Oracle Database architecture
Using Single-Row Functions to Customize Output	10%	- Perform arithmetic with date data - Manipulate strings with character function in the SELECT and WHERE clauses - Manipulate numbers with the ROUND, TRUNC, and MOD functions - Manipulate dates with the date functions - Describe the differences between single-row and multiple-row functions
Using Subqueries to Solve Queries	15%	- Define subqueries - Describe the types of problems that subqueries can solve - List the types of subqueries - Write single-row and multi-row subqueries

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Oracle Database SQL Sample Questions (Q225-Q230):

NEW QUESTION # 225
Examine the description of the EMPLOYEES table:

Which statement increases each employee's SALARY by the minimum SALARY for their DEPARTM ENT_ID?

A. UPDATE employees e1
SET salary=
(SELECT e1.salary + MIN(e2.salary)
FROM employees e2
WHERE e1. department_ id = e2.department_id);
B. UPDATE employees e1
SET salary =(SELECT e2. salary + MIN(e2.salary)
FROM employees e2
WHERE e1.department_ id = e2. department_id GROUP BY e2. department_id) ;
C. UPDATE employees e1
SET salary = salary +
(SELECT MIN(e1. salary)
FROM employees e2
WHERE e1.department_id = e2 .department_id);
D. UPDATE employees e1
SET salary = salary+(SELECT MIN (salary)
FROM employees e2) ;

Answer: A

Explanation:
The correct statement to increase each employee's salary by the minimum salary for their department is:
D: This option correctly increases each employee's salary by the minimum salary in their department. The subquery calculates the minimum salary for the department of the current row being updated (e1) in the outer UPDATE statement. The subquery does not use GROUP BY since it returns a single value - the minimum salary for the matching department.A, B, and C are incorrect. Specifically:
* A uses a subquery with an aggregate function combined with GROUP BY, which is not needed and will result in an error.
* B incorrectly references MIN(e1.salary) within the subquery, which is incorrect since e1 is the alias for the outer query's table and should not be used within the subquery.
* C sets the salary to itself plus the minimum salary across all employees, not filtered by the department.
References:
* Oracle Database SQL Language Reference, 12c Release 1 (12.1): "UPDATE"

NEW QUESTION # 226
Which two will execute successfully?

A. SELECT NVL('DATE',SYSDATE) FROM DUAL;
B. SELECT COALESCE('DATE',SYSDATE) FROM (SELECT NULL AS "DATE" FROM DUAL) ;
C. SELECT COALESCR('DATE', SYSDATE) FROM DUAL;
D. SELECT COALESCE(O,SYSDATE) TRCH DUAL;
E. SELECT NVL('DATE',200) FROM (SELECT NULL AS "DATE" FROM DUAL);

Answer: E

Explanation:
D). True. The NVL function can replace a NULL value with a specified value, and it does not require the data types to match exactly, allowing implicit conversion where possible. Here, 'DATE' is a string literal, and 200 is a number, and since the selected column is NULL, NVL will return 200.
The other options are incorrect because the COALESCE function requires all arguments to be of the same data type or at least compatible types that Oracle can implicitly convert. In A and E, the use of COALESCE with a string literal 'DATE' and SYSDATE (which is a date type) is not compatible without explicit conversion. Option C has a typo (TRCH instead of FROM) and is mixing data types incorrectly.

NEW QUESTION # 227
Examine the description of the ORDERS table:
Which three statements execute successfully?

A. SELECT ORDER_ID INVOICE_ID ORDER-DATE FROM ORDERS
MINUS
SELECT INVOICE_ID INVOICE_DATA FROM INVOICE ORDER BY INVOICE_ID;
B. SELECT * FROM ORDERS ORDER BY ORDER_ID
UNION
SELECT * FROM INVOICES;
C. (SELECT * FROM ORDERS
D. SELECT ORDER_ID ORDER_DATE FROM ORDERS
UION ALL
SELECT INVOICE_ID, INVOICE_DATE FROM INVOICE ORDER BY ORDER_ID;
E. SELECT * FROM ORDERS ORDER BY ORDER_ID
INTERSECT
SELECT * FROM INVOICE ORDER BY INVOICE_ID;

Answer: A,D

NEW QUESTION # 228
Examine the structure of the EMPLOYEES table.

You must display the maximum and minimum salaries of employees hired 1 year ago.
Which two statements would provide the correct output? (Choose two.)

A. SELECT MIN(Salary), MAX(salary)FROM (SELECT salary FROMemployeesWHERE hire_date < SYSDATE-365);
B. SELECT minsal, maxsalFROM (SELECT MIN(salary) minsal, MAX(salary) maxsalFROM employeesWHERE hire_date < SYSDATE-365GROUP BY MIN(salary), MAX(salary));
C. SELECT MIN(Salary) minsal, MAX(salary) maxsalFROM employeesWHERE hire_date < SYSDATE-365GROUP BY MIN(salary), MAX(salary);
D. SELECT minsal, maxsalFROM (SELECT MIN(salary) minsal, MAX(salary) maxsalFROM employeesWHERE hire_date < SYSDATE-365)GROUP BY maxsal, minsal;

Answer: A,D

NEW QUESTION # 229
View the exhibit and examine the description of the DEPARTMENTSand EMPLOYEEStables.

You wrote this SQL statement to retrieve EMPLOYEE_ID, FIRST_NAME, and DEPARTMENT NAME, for all employees:
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 table prefix is missing for the column names in the SELECTclause.
B. The NATURAL JOINclause is missing the USINGclause.
C. The EMPLOYEESand DEPARTMENTStables have more than one column with the same column name and data type.
D. The DEPARTMENTStable is not used before the EMPLOYEEStable in the FROMclause.

Answer: C

Explanation:
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)

NEW QUESTION # 230
......

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