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Oracle 1z0-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q18-Q23):

NEW QUESTION # 18
The INVOICE table has a QTY_SOLD column of data type NUMBER and an INVOICE_DATE column of data type DATE NLS_DATE_FORMAT is set to DD-MON-RR.
Which two are true about data type conversions involving these columns in query expressions?

A. qty_sold ='05549821 ': requires explicit conversion
B. invoice_date> '01-02-2019': uses implicit conversion
C. invoice_date = '15-march-2019': uses implicit conversion
D. qty_sold BETWEEN '101' AND '110': uses implicit conversion
E. CONCAT(qty_sold, invoice_date): requires explicit conversion

Answer: B,C

Explanation:
The statements regarding data type conversions and the treatment of literals in SQL expressions involve understanding implicit and explicit data conversions in Oracle SQL.
* Statement A is true as invoice_date > '01-02-2019' involves an implicit conversion of the string literal to a date type, based on the NLS_DATE_FORMAT setting, assuming the format matches.
* Statement E is true because, similarly to A, invoice_date = '15-march-2019' involves an implicit conversion where the string is automatically converted to a date type according to the Oracle NLS_DATE_FORMAT or an assumed default date format.
* Statements B, C, and D involve incorrect or misleading information:
* B (qty_sold = '05549821') is misleading and potentially incorrect as leading zeros in a numeric context do not typically require explicit conversion but the presence of spaces might suggest a need for trimming rather than numeric conversion.
* C (CONCAT(qty_sold, invoice_date)) would indeed require explicit conversion because CONCAT expects string types, and thus numerical and date values must be explicitly converted
* to strings before concatenation.
* D (qty_sold BETWEEN '101' AND '110') uses implicit conversion where the string literals '101' and '110' are implicitly converted to numbers if qty_sold is a numeric type.

NEW QUESTION # 19
View the Exhibit and examine the structure of the ORDERStable.

Which UPDATE statement is valid?

A. UPDATE orders
SET order_date = '12-mar-2007',
order_total IS NULL
WHERE order_id = 2455;
B. UPDATE orders
SET order_date = '12-mar-2007',
order_total = NULL
WHERE order_id = 2455;
C. UPDATE orders
SET order_date = TO_DATE('12-mar-2007','dd-mon-yyyy'), SET order_total = TO_NUMBER (NULL) WHERE order_id = 2455;
D. UPDATE orders
SET order_date = '12-mar-2007',
AND order_total = TO_NUMBER(NULL)
WHERE order_id = 2455;

Answer: B

NEW QUESTION # 20
View the Exhibit and examine the structure of the PRODUCT_INFORMATION table.

You want to see the product names and the date of expiration of warranty for all the products, if the product is purchased today. The products that have no warranty should be displayed at the top and the products with maximum warranty period should be displayed at the bottom.
Which SQL statement would you execute to fulfill this requirement?

A. SELECT product_name, SYSDATE+warranty_period AS "Warranty expire date"FROM product_informationORDER BY SYSDATE+warranty_period
B. SELECT product_name, SYSDATE+warranty_period AS "Warranty expire date"FROM product_informationORDER BY SYSDATE
C. SELECT product_name, SYSDATE+warranty_period AS "Warranty expire date"FROM product_informationWHERE warranty_period > SYSDATE
D. SELECT product_name, SYSDATE+warranty_period AS "Warranty expire date"FROM product_informationORDER BY SYSDATE-warranty_period

Answer: A

NEW QUESTION # 21
View the Exhibit and examine the details of PRODUCT_INFORMATION table.
PRODUCT_NAME
CATEGORY_ID
SUPPLIER_ID
Inkjet C/8/HQ
12
102094
Inkjet C/4
12
102090
LaserPro 600/6/BW
12
102087
LaserPro 1200/8/BW
12
102099
Inkjet B/6
12
102096
Industrial 700/ID
12
102086
Industrial 600/DQ
12
102088
Compact 400/LQ
12
102087
Compact 400/DQ
12
102088
HD 12GB /R
13
102090
HD 10GB /I
13
102071
HD 12GB @7200 /SE
13
102057
HD 18.2GB @10000 /E
13
102078
HD 18.2GB @10000 /I
13
102050
HD 18GB /SE
13
102083
HD 6GB /I
13
102072
HD 8.2GB@5400
13
102093
You have the requirement to display PRODUCT_NAME from the table where the CATEGORY_ID column has values 12 or 13, and the SUPPLIER_ID column has the value
102088. You executed the following SQL statement:
SELECT product_name
FROM product_information
WHERE (category_id = 12 AND category_id = 13) AND supplier_id = 102088; Which statement is true regarding the execution of the query?

A. It would execute and the output would display the desired result.
B. It would execute but the output would return no rows.
C. It would not execute because the same column has been used in both sides of the AND logical operator to form the condition.
D. It would not execute because the entire WHERE clause condition is not enclosed within the parentheses.

Answer: B

NEW QUESTION # 22
Which statement is true regarding the USINGclause in table joins? (Choose two.)

A. It can be used to access data from tables through equijoins as well as nonequijoins.
B. It can be used to join tables that have columns with the same name and compatible data types.
C. It can be used to join a maximum of three tables.
D. It can be used to restrict the number of columns used in a NATURALjoin.

Answer: B,D

NEW QUESTION # 23
......

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