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Oracle 1z1-071 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Retrieving Data Using SQL SELECT Statement	20%	- Arithmetic operations and NULL handling - SELECT statement syntax and usage - Column aliases, concatenation, literals and DISTINCT
Topic 2: Managing Views		- Create, modify and drop views - Updatable and read-only views
Topic 3: Using Subqueries to Solve Queries		- Single-row and multi-row subqueries - Correlated subqueries for update/delete
Topic 4: Working with Time Zones and Date/Time Data		- TIMESTAMP, INTERVAL data types - Time zone conversion functions
Topic 5: Using Single-Row Functions to Customize Output	20%	- Character, number, and date functions - Nested functions usage
Topic 6: Using Data Dictionary Views		- Retrieve metadata and object information
Topic 7: Manipulating Data and Managing Transactions		- Transaction control: COMMIT, ROLLBACK, SAVEPOINT - Multi-table inserts - INSERT, UPDATE, DELETE, MERGE statements
Topic 8: Aggregating Data Using Group Functions	10%	- GROUP BY and HAVING clauses - Handling NULLs in group functions - SUM, AVG, COUNT, MAX, MIN functions
Topic 9: Managing Indexes, Synonyms and Sequences		- Create and use sequences - Create and maintain indexes - Create and use synonyms
Topic 10: Controlling User Access		- Roles, granting and revoking privileges - System and object privileges
Topic 11: Displaying Data from Multiple Tables	15%	- Cartesian products - Self-joins and outer joins - Equijoins and non-equijoins
Topic 12: Conversion Functions and Conditional Expressions	10%	- TO_CHAR, TO_NUMBER, TO_DATE functions - Implicit and explicit data type conversion - NVL, NULLIF, COALESCE and CASE expressions
Topic 13: Restricting and Sorting Data	15%	- WHERE clause and filtering conditions - ORDER BY clause and sorting rules - Substitution variables, DEFINE and VERIFY commands - Operator precedence
Topic 14: Managing Tables and Constraints		- Temporary and external tables - Constraints: primary key, foreign key, unique, check, not null - Data types, creating/altering/dropping tables
Topic 15: Relational Database Concepts	10%	- Theoretical and physical aspects of relational databases - ERD and SQL statement mapping - Relationship between database and SQL
Topic 16: Using SET Operators		- UNION, UNION ALL, INTERSECT, MINUS operators - Ordering results with set operations

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Oracle Database SQL Sample Questions (Q132-Q137):

NEW QUESTION # 132
Which statement is true regarding the INTERSECT operator?

A. The number of columns and data types must be identical for all SELECT statements in the query.
INTERSECT Returns only the rows that occur in both queries' result sets, sorting them and removing duplicates.
The columns in the queries that make up a compound query can have different names, but the output result set will use the names of the columns in the first query.
B. Reversing the order of the intersected tables alters the result.
C. The names of columns in all SELECT statements must be identical.
D. It ignores NULLs.

Answer: A

NEW QUESTION # 133

For each employee in department 90 you want to display:
1. their last name
2. the number of complete weeks they have been employed
The output must be sorted by the number of weeks, starting with the longest serving employee first.Which statement will accomplish this?

A. SELECT last_name, ROUND( (SYSDATE - hire_ date) 17) AS tenure
FROM employees
WHERE department_ id = 90
ORDER BY tenure DESC;
B. SELECT last_name, TRUNC( (SYSDATE - hire_ date) 1 7) AS tenure
FROM employees
WHERE department_ id = 90
ORDER BY tenure ;
C. SELECT last_name, ROUND( (SYSDATE - hire_ date) 1 7) AS tenure
FROM employees
WHERE department_ id = 90
ORDER BY tenure ;
D. SELECT last_name, TRUNC ( (SYSDATE - - hire_ date) 1 7) AS tenure
FROM employees
WHERE department_id = 90
ORDER BY tenure DESC;

Answer: D

NEW QUESTION # 134
Examine the structure of the MEMBERS table:

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

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

Answer: A

NEW QUESTION # 135
Examine the structure of the ORDERS table: (Choose the best answer.)

You want to find the total value of all the orders for each year and issue this command:
SQL> SELECT TO_CHAR(order_date,'rr'), SUM(order_total) FROM orders
GROUP BY TO_CHAR(order_date, 'yyyy');
Which statement is true regarding the result?

A. It returns an error because the TO_CHAR function is not valid.
B. It executes successfully but does not give the correct output.
C. It return an error because the datatype conversion in the SELECT list does not match the data type conversion in the GROUP BY clause.
D. It executes successfully and gives the correct output.

Answer: C

NEW QUESTION # 136
View the Exhibit and examine the structure of the ORDERS table.

Which UPDATE statement is valid?

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

Answer: B

NEW QUESTION # 137
......

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