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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q16-Q21):

NEW QUESTION # 16
Which three are true about the MERGEstatement?

A. It can use views to produce source rows.
B. It can use subqueries to produce source rows.
C. It can update the same row of the target table multiple times.
D. It can merge rows only from tables.
E. It can update, insert, or delete rows conditionally in multiple tables.
F. It can combine rows from multiple tables conditionally to insert into a single table.

Answer: A,B,E

Explanation:
Explanation/Reference: https://www.oracletutorial.com/oracle-basics/oracle-merge/

NEW QUESTION # 17
View the Exhibits and examine PRODUCTS and SALES tables.
Exhibit 1

Exhibit 2

You issue the following query to display product name the number of times the product has been sold:

What happens when the above statement is executed?

A. The statement executes successfully and produces the required output.
B. The statement produces an error because a subquery in the FROM clause and outer- joins cannot be used together.
C. The statement produces an error because the GROUP BY clause cannot be used in a subquery in the FROM clause.
D. The statement produces an error because ITEM_CNT cannot be displayed in the outer query.

Answer: A

NEW QUESTION # 18
Which three statements are true regarding group functions? (Choose three.)

A. They can be used on only one column in the SELECT clause of a SQL statement.
B. They can be passed as an argument to another group function.
C. They can be used only with a SQL statement that has the GROUP BY clause.
D. They can be used along with the single-row function in the SELECT clause of a SQL statement.
E. They can be used on columns or expressions.

Answer: B,D,E

Explanation:
Explanation
References:
https://www.safaribooksonline.com/library/view/mastering-oracle-sql/0596006322/ch04.html

NEW QUESTION # 19
View the exhibit and examine the structure of the SALES, CUSTOMERS, PRODUCTS and TIMES tables.

The PROD_ID column is the foreign key in the SALES table referencing the PRODUCTS table.
The CUST_ID and TIME_ID columns are also foreign keys in the SALES table referencing the CUSTOMERS and TIMES tables, respectively.
Examine this command:
CREATE TABLE new_sales (prod_id, cust_id, order_date DEFAULT SYSDATE)
AS
SELECT prod_id, cust_id, time_id
FROM sales;
Which statement is true?

A. The NEW_SALES table would get created and all the FOREIGN KEY constraints defined on the selected columns from the SALES table would be created on the corresponding columns in the NEW_SALES table.
B. The NEW_SALES table would not get created because the column names in the CREATE TABLE command and the SELECT clause do not match.
C. The NEW_SALES table would get created and all the NOT NULL constraints defined on the selected columns from the SALES table would be created on the corresponding columns in the NEW_SALES table.
D. The NEW_SALES table would not get created because the DEFAULT value cannot be specified in the column definition.

Answer: C

NEW QUESTION # 20
Examine this SQL statement:

Identify three order by clauses, any one of which can complete the query successfully.

A. ORDER BY "CUST NO"
B. ORDER BY 2, cust_id
C. ORDER BY 2, 1
D. ORDER BY "Last Name"
E. ORDER BY CUST_NO

Answer: B,C,D

NEW QUESTION # 21
......

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