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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q225-Q230):

NEW QUESTION # 225
Which three are true about subqueries?

A. A subquery can be used in a HAVING clause.
B. =ANY can only evaluate the argument against a subcjuery if it returns two or more values.
C. A subquery cannot be used in the select list.
D. < any returns true if the argument is less than the lowest value returned by the subquery.
E. A subquery can be used in a WHERE clause.
F. A subquery cannot be used in a FROM clause.
G. <ANY returns true if the argument is less than the highest value returned by the subquery.

Answer: A,E,G

NEW QUESTION # 226
Evaluate the following SQL statement:
SQL> select cust_id, cust_last_name "Last name"
FROM customers
WHERE country_id = 10
UNION
SELECT cust_id CUST_NO, cust_last_name
FROM customers
WHERE country_id = 30
Identify three ORDER BY clauses either one of which can complete the query. (Choose three.)

A. ORDER BY CUST_NO
B. ORDER BY "CUST_NO"
C. ORDER BY 2, cust_id
D. ORDER BY 2,1
E. ORDER BY "Last name"

Answer: C,D,E

Explanation:
Using the ORDER BY Clause in Set Operations
-The ORDER BY clause can appear only once at the end of the compound query.
-Component queries cannot have individual ORDER BY clauses.
-The ORDER BY clause recognizes only the columns of the first SELECT query.
-By default, the first column of the first SELECT query is used to sort the output in an ascending order.

NEW QUESTION # 227
Which two statements are true regarding indexes? (Choose two.)

A. A UNIQUE index can be altered to be non-unique.
B. When a table is dropped and is moved to the RECYCLE BIN, all indexes built on that table are permanently dropped.
C. An update to a table can result in no updates to any of the table's indexes.
D. A table belonging to one user cannot have an index that belongs to a different user.
E. An update to a table can result in updates to any or all of the table's indexes.

Answer: C,D

NEW QUESTION # 228
View the Exhibit and examine the data in the PRODUCTS table. (Choose the best answer.)

You must display product names from the PRODUCTS table that belong to the 'Software/other' category with minimum prices as either $2000 or $4000 and with no unit of measure.
You issue this query:
SQL > SELECT prod_name, prod_category, prod_min_price FROM products
Where prod_category LIKE '%Other%' AND (prod_min_price = 2000 OR prod_min_price = 4000) AND prod_unit_of_measure <> ' '; Which statement is true?

A. It generates an error because the condition specified for PROD_UNIT_OF_MEASURE is not valid.
B. It executes successfully and returns the required result.
C. It generates an error because the condition specified for the PROD_CATEGORY column is not valid.
D. It executes successfully but returns no result.

Answer: D

NEW QUESTION # 229
Examine the description or the BOOKS_TRANSACTIONS table:

FOR customers whose income level has a value, you want to display the first name and due amount as 5% of their credit limit. Customers whose due amount is null should not be displayed.
Which query should be used?

A. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust income_level !=NULL
AND cust credit_level !=NULL;
B. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust income_level IS NOT NULL
AND due_amount IS NOT NULL;
C. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust income_level !=NULL
AND due_amount !=NULL;
D. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust income_level <> NULL
AND due_amount <> NULL;
E. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust_income_level IS NOT NULL
AND cust_credit_limit IS NOT NULL;

Answer: E

NEW QUESTION # 230
......

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