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Oracle 1z0-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q280-Q285):

NEW QUESTION # 280
Examine the structure of the PROMOTIONS table:

Management requires a report of unique promotion costs in each promotion category.
Which query would satisfy this requirement?

A. SELECT promo_category, DISTINCT promo_cost FROM promotions;
B. SELECT DISTINCT promo_cost, DISTINCT promo_category FROM promotions;
C. SELECT DISTINCT promo_category, promo_cost FROM promotions ORDER BY 1;
D. SELECT DISTINCT promo_cost, promo_category FROM promotions;

Answer: C

NEW QUESTION # 281
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 BETWEEN '101' AND '110': uses implicit conversion
B. CONCAT(qty_sold, invoice_date): requires explicit conversion
C. invoice_date = '15-march-2019': uses implicit conversion
D. qty_sold ='05549821 ': requires explicit conversion
E. invoice_date> '01-02-2019': uses implicit conversion

Answer: A,C

NEW QUESTION # 282
View the exhibit and examine the ORDERStable.
ORDERS
Name Null? Type
ORDER ID NOT NULL NUMBER(4)
ORDATE DATE DATE
CUSTOMER ID NUMBER(3)
ORDER TOTAL NUMBER(7,2)
The ORDERStable contains data and all orders have been assigned a customer ID. Which statement would add a NOTNULLconstraint to the CUSTOMER_IDcolumn?

A. ALTER TABLE orders
ADD CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
B. ALTER TABLE orders
ADD customer_id NUMBER(6)CONSTRAINT orders_cust_id_nn NOT NULL;
C. ALTER TABLE orders
MODIFY CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
D. ALTER TABLE orders
MODIFY customer_id CONSTRAINT orders_cust_nn NOT NULL (customer_id);

Answer: D

NEW QUESTION # 283
Examine the types and examples of relationship that follow:
1 One-to-one a) teacher to Student
2 One-to-many b) Employees to Manager
3 Many-to-one c) Person to SSN
4 Many-to-many d) Customers to Products
Which option indicates correctly matched relationships?

A. 1-d, 2-b, 3-a, and 4-c
B. 1-c, 2-d, 3-a, and 4-b
C. 1-a, 2-b, 3-c, and 4-d
D. 1-c, 2-a, 3-b, and 4-d

Answer: C

NEW QUESTION # 284
View the Exhibit and examine the description of the ORDERS table.

A. WHERE order_date > TO_DATE('JUL 10 2006','MON DD YYYY')
B. WHERE TO_CHAR(order_date,'MON DD YYYY') = 'JAN 20 2003'
C. Which two WHERE clause conditions demonstrate the correct usage of conversion functions? (Choose two.) WHERE order_date_IN ( TO_DATE('OCT 21 2003','MON DD YYYY'), TO_CHAR('NOV 21
D. 2003','MON DD YYYY') )
WHERE order_date > TO_CHAR(ADD_MONTHS(SYSDATE,6),'MON DD YYYY')

Answer: A,B

NEW QUESTION # 285
......

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