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Oracle 1z1-071 Exam Syllabus Topics:

Section	Weight	Objectives
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
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
Retrieving Data Using SQL SELECT Statement	20%	- Column aliases, concatenation, literals and DISTINCT - SELECT statement syntax and usage - Arithmetic operations and NULL handling
Managing Views		- Create, modify and drop views - Updatable and read-only views
Displaying Data from Multiple Tables	15%	- Self-joins and outer joins - Equijoins and non-equijoins - Cartesian products
Managing Indexes, Synonyms and Sequences		- Create and use synonyms - Create and use sequences - Create and maintain indexes
Controlling User Access		- System and object privileges - Roles, granting and revoking privileges
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
Manipulating Data and Managing Transactions		- Multi-table inserts - INSERT, UPDATE, DELETE, MERGE statements - Transaction control: COMMIT, ROLLBACK, SAVEPOINT
Relational Database Concepts	10%	- Theoretical and physical aspects of relational databases - ERD and SQL statement mapping - Relationship between database and SQL
Restricting and Sorting Data	15%	- Substitution variables, DEFINE and VERIFY commands - ORDER BY clause and sorting rules - Operator precedence - WHERE clause and filtering conditions
Conversion Functions and Conditional Expressions	10%	- NVL, NULLIF, COALESCE and CASE expressions - Implicit and explicit data type conversion - TO_CHAR, TO_NUMBER, TO_DATE functions
Managing Tables and Constraints		- Temporary and external tables - Data types, creating/altering/dropping tables - Constraints: primary key, foreign key, unique, check, not null

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Oracle Database SQL Sample Questions (Q146-Q151):

NEW QUESTION # 146
You must create a SALES table with these column specifications and data types: (Choose the best answer.) SALESID: Number
STOREID: Number
ITEMID: Number
QTY: Number, should be set to 1 when no value is specified
SLSDATE: Date, should be set to current date when no value is specified PAYMENT: Characters up to 30 characters, should be set to CASH when no value is specified Which statement would create the table?

A. CREATE TABLE Sales
(SALESID NUMBER (4),
STOREID NUMBER (4),
ITEMID NUMBER (4),
QTY NUMBER DEFAULT = 1,
SLSDATE DATE DEFAULT SYSDATE,
PAYMENT VAR
CHAR2(30) DEFAULT = "CASH");
B. CREATE TABLE Sales
(SALESID NUMBER (4),
STOREID NUMBER (4),
ITEMID NUMBER (4),
QTY NUMBER DEFAULT = 1,
SLSDATE DATE DEFAULT 'SYSDATE',
PAYMENT VARCHAR2(30) DEFAULT CASH);
C. Create Table sales
(salesid NUMBER (4),
Storeid NUMBER (4),
Itemid NUMBER (4),
QTY NUMBER DEFAULT 1,
Slsdate DATE DEFAULT SYSDATE,
payment VARCHAR2(30) DEFAULT 'CASH');
D. CREATE TABLE Sales
(SALESID NUMBER (4),
STOREID
NUMBER (4),
ITEMID NUMBER (4),
qty NUMBER DEFAULT = 1,
SLSDATE DATE DEFAULT SYSDATE,
PAYMENT VARCHAR2(30) DEFAULT = "CASH");

Answer: C

NEW QUESTION # 147
You execute this query:

What is the result?

A. It returns the date for the first Monday of the next month.
B. It generates an error.
C. It returns the date for the last Monday of the current month.
D. It executes successfully but does not return any result.

Answer: A

NEW QUESTION # 148
Examine the description of the EMPLOYEES table:

NLS_DATE FORMAT is DD-MON-RR.
Which two queries will execute successfully?

A. SELECT AVG(MAX(salary)) FROM employees GROUP BY salary;
B. SELECT dept_ iD, sum(salary) FROM employees WHERE hire_date > '01-JAN-9' GROUP BY dept_id;
C. SELECT dept_ id, AVG(MAX(salary)) FROM employees GROUP BY dept_id, salary;
D. SELECT dept id, MAX (SUM(salary)) FROM employees GROUP BY dept_id;
E. SELECT dept_ id, AVG (MAX(salary)) FROM employees GROUP By dept_id HAVING hire_date> ' O1-JAN-19';

Answer: A,B

NEW QUESTION # 149
Evaluate the following statement.

Which statement is true regarding the evaluation of rows returned by the subquery in the INSERT statement?

A. They are evaluated by the first WHEN clause. If the condition is true, then the row would be evaluated by the subsequent WHEN clauses.
B. They are evaluated by all the three WHEN clauses regardless of the results of the evaluation of any other WHEN clause.
C. They are evaluated by the first WHEN clause. If the condition is false, then the row would be evaluated by the subsequent WHEN clauses.
D. The insert statement would give an error because the ELSE clause is not present for support in case none of WHEN clauses are true.

Answer: B

Explanation:
Explanation
http://psoug.org/definition/WHEN.htm

NEW QUESTION # 150
The first DROP operation is performed on PRODUCTS table using the following command:
DROP TABLE products PURGE;
Then you performed the FLASHBACK operation by using the following command:
FLASHBACK TABLE products TO BEFORE DROP;
Which statement describes the outcome of the FLASHBACK command?

A. It is not possible to recover the table structure, data, or the related indexes.
B. It recovers only the table structure.
C. It recovers the table structure and data but not the related indexes.
D. It recovers the table structure, data, and the indexes.

Answer: A

Explanation:
Explanation
References:
https://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_9003.htm

NEW QUESTION # 151
......

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