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Oracle 1z1-071 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Restricting and Sorting Data	15%	- Operator precedence - Substitution variables, DEFINE and VERIFY commands - WHERE clause and filtering conditions - ORDER BY clause and sorting rules
Topic 2: Retrieving Data Using SQL SELECT Statement	20%	- SELECT statement syntax and usage - Arithmetic operations and NULL handling - Column aliases, concatenation, literals and DISTINCT
Topic 3: Relational Database Concepts	10%	- Theoretical and physical aspects of relational databases - Relationship between database and SQL - ERD and SQL statement mapping
Topic 4: Working with Time Zones and Date/Time Data		- Time zone conversion functions - TIMESTAMP, INTERVAL data types
Topic 5: Controlling User Access		- Roles, granting and revoking privileges - System and object privileges
Topic 6: Manipulating Data and Managing Transactions		- Multi-table inserts - Transaction control: COMMIT, ROLLBACK, SAVEPOINT - INSERT, UPDATE, DELETE, MERGE statements
Topic 7: Managing Tables and Constraints		- Temporary and external tables - Data types, creating/altering/dropping tables - Constraints: primary key, foreign key, unique, check, not null
Topic 8: Using Data Dictionary Views		- Retrieve metadata and object information
Topic 9: Managing Indexes, Synonyms and Sequences		- Create and use sequences - Create and maintain indexes - Create and use synonyms
Topic 10: Using Single-Row Functions to Customize Output	20%	- Character, number, and date functions - Nested functions usage
Topic 11: Managing Views		- Create, modify and drop views - Updatable and read-only views
Topic 12: Conversion Functions and Conditional Expressions	10%	- Implicit and explicit data type conversion - NVL, NULLIF, COALESCE and CASE expressions - TO_CHAR, TO_NUMBER, TO_DATE functions
Topic 13: Using Subqueries to Solve Queries		- Single-row and multi-row subqueries - Correlated subqueries for update/delete
Topic 14: Displaying Data from Multiple Tables	15%	- Self-joins and outer joins - Equijoins and non-equijoins - Cartesian products
Topic 15: Using SET Operators		- Ordering results with set operations - UNION, UNION ALL, INTERSECT, MINUS operators
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 (Q15-Q20):

NEW QUESTION # 15
Which two statements are true about the rules of precedence for operators? (Choose two.)

A. NULLS influence the precedence of operators in an expression
B. The concatenation operator | | is always evaluated before addition and subtraction in an expression
C. The + binary operator has the highest precedence in an expression in a SQL statement
D. Arithmetic operators with equal precedence area evaluated from left to right within an expression
E. Multiple parentheses can be used to override the default precedence of operators in an expression

Answer: C,E

Explanation:
https://docs.oracle.com/cd/B19306_01/server.102/b14200/operators001.htm

NEW QUESTION # 16
Examine this query:
SELECT TRUNC(ROUND(156.00, -2), -1) FROM DUAL;
What is the result?

A. 0
B. 1
C. 2
D. 3
E. 4

Answer: A

Explanation:
https://docs.oracle.com/cd/B19306_01/server.102/b14200/functions200.htm

NEW QUESTION # 17
View the Exhibit and examine the structure of ORDER_ITEMSand ORDERStables.

You need to remove from the ORDER_ITEMStable those rows that have an order status of 0 or 1 in the ORDERStable.
Which two DELETEstatements are valid (Choose two.)
DELETE *

A. WHERE order_id = (SELECT order_id FROM orders o
WHERE i.order_id = o.order_id AND order_status IN (0,1));
DELETE
B. FROM (SELECT * FROM order_items I,orders o
WHERE i.order_id = o.order_id AND order_status IN (0,1));
DELETE FROM order_items i
C. FROM order_items
WHERE order_id IN (SELECT order_id)
FROM orders
WHERE order_status IN (0,1));
DELETE
D. FROM order_items
WHERE order_id IN (SELECT order_id
FROM orders
WHERE orders_status in (0,1));

Answer: B,D

NEW QUESTION # 18
Examine the structure of the MEMBERS table: (Choose the best answer.)

Examine the SQL statement:
SQL > SELECT city, last_name LNAME FROM MEMBERS ORDER BY 1, LNAME DESC; What would be the result execution?

A. It displays all cities in descending order, within which the last names are further sorted in descending order.
B. It fails because a column number and a column alias cannot be used together in the ORDER BY clause.
C. It displays all cities in ascending order, within which the last names are further sorted in descending order.
D. It fails because a column alias cannot be used in the ORDER BY clause.

Answer: C

NEW QUESTION # 19
View the exhibit and examine the structures of the EMPLOYEESand DEPARTMENTStables.

You want to update EMPLOYEEStable as follows:
Update only those employees who work in Boston or Seattle (locations 2900 and 2700).

Set department_idfor these employees to the department_idcorresponding to London

(location_id 2100).
Set the employees' salary in location_id2100 to 1.1 times the average salary of their department.

Set the employees' commission in location_id2100 to 1.5 times the average commission of their

department.
You issue the following command:

What is outcome?

A. It executes successfully and gives the desired update
B. It executes successfully but does not give the desired update
C. It generates an error because multiple columns (SALARY, COMMISSION)cannot be specified together in an UPDATEstatement.
D. It generates an error because a subquery cannot have a join condition in a UPDATEstatement.

Answer: B

NEW QUESTION # 20
......

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