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Oracle 1z0-071 Exam Syllabus Topics:

Section	Weight	Objectives
Aggregating Data Using Group Functions	10%	- Handling NULLs in group functions - GROUP BY and HAVING clauses - SUM, AVG, COUNT, MAX, MIN functions
Controlling User Access		- System and object privileges - Roles, granting and revoking privileges
Using Data Dictionary Views		- Retrieve metadata and object information
Working with Time Zones and Date/Time Data		- TIMESTAMP, INTERVAL data types - Time zone conversion functions
Using Single-Row Functions to Customize Output	20%	- Character, number, and date functions - Nested functions usage
Using Subqueries to Solve Queries		- Single-row and multi-row subqueries - Correlated subqueries for update/delete
Displaying Data from Multiple Tables	15%	- Self-joins and outer joins - Equijoins and non-equijoins - Cartesian products
Retrieving Data Using SQL SELECT Statement	20%	- Arithmetic operations and NULL handling - SELECT statement syntax and usage - Column aliases, concatenation, literals and DISTINCT
Managing Indexes, Synonyms and Sequences		- Create and maintain indexes - Create and use synonyms - Create and use sequences
Managing Tables and Constraints		- Temporary and external tables - Constraints: primary key, foreign key, unique, check, not null - Data types, creating/altering/dropping tables
Managing Views		- Updatable and read-only views - Create, modify and drop views
Restricting and Sorting Data	15%	- ORDER BY clause and sorting rules - Substitution variables, DEFINE and VERIFY commands - WHERE clause and filtering conditions - Operator precedence
Manipulating Data and Managing Transactions		- INSERT, UPDATE, DELETE, MERGE statements - Transaction control: COMMIT, ROLLBACK, SAVEPOINT - Multi-table inserts
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
Using SET Operators		- Ordering results with set operations - UNION, UNION ALL, INTERSECT, MINUS operators
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 (Q328-Q333):

NEW QUESTION # 328
Evaluate the following SQL statement:
SELECT product_name || 'it's not available for order'
FROM product_information
WHERE product_status = 'obsolete';
You received the following error while executing the above query:
ERROR
ORA-01756: quoted string not properly terminated
What would you do to execute the query successfully?

A. Use the Oracle (q) operator and delimiter to allow the use of a single quotation mark within the literal character string in the SELECT clause
B. Use the escape character to negate the single quotation mark within the literal character string in the SELECT clause
C. Enclose the character literal string in the SELECT clause within double quotation marks
D. Remove the single quotation marks enclosing the character literal string in the SELECT clause

Answer: A

Explanation:
Explanation
References:
http://docs.oracle.com/cd/B19306_01/server.102/b14200/sql_elements003.htm

NEW QUESTION # 329
View the Exhibit and examine the structure of the BOOKStable.

The BOOKS table contains details of 100 books.
Examine the commands executed and their outcome:

Which statement is true?

A. Both ROLLBACKcommands restore the 101 rows that were deleted.
B. The first rollback restores the 100 rows that were deleted and the second rollback commits only the changes.
C. The first rollback restores the 101 rows that were deleted and the second rollback causes the row was inserted to be deleted and commits the changes.
D. Both ROLLBACKcommands restore the 100 rows that were deleted.

Answer: C

NEW QUESTION # 330
You need to calculate the number of days from 1st January 2019 until today.
Dates are stored in the default format of DD-MON-RR.
Which two queries give the required output?

A. SELECT ROUND(SYSDATE ?'01-JAN-2019') FROM DUAL;
B. SELECT SYSDATE ?TO_DATE('01-JANUARY-2019') FROM DUAL;
C. SELECT ROUND(SYSDATE ?TO_DATE(`01/JANUARY/2019')) FROM DUAL;
D. SELECT TO_DATE(SYSDATE, `DD/MONTH/YYYY') ?`01/JANUARY/2019' FROM DUAL;
E. SELECT TO_CHAR(SYSDATE, `DD-MON-YYYY') ?'01-JAN-2019' FROM DUAL;

Answer: E

NEW QUESTION # 331
Which two will execute successfully? (Choose two.)

A. SELECT COALESCE('DATE', SYSDATE) FROM (SELECT NULL AS "DATE" FROM DUAL);
B. SELECT COALESCE('DATE', SYSDATE) FROM DUAL;
C. SELECT COALESCE(0, SYSDATE) FROM DUAL;
D. SELECT NVL('DATE', SYSDATE) FROM DUAL;
E. SELECT NVL('DATE', 200) FROM (SELECT NULL AS "DATE" FROM DUAL);

Answer: A,C

NEW QUESTION # 332
Examine this query:
SELECT INTERVAL '100' MONTH DURATION FROM DUAL;
What will be the output?

A. DURATION
+08
B. an error
C. DUFATION
+100
D. DURATION
+08-04

Answer: D

NEW QUESTION # 333
......

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