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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q349-Q354):

NEW QUESTION # 349
Which two statements are true about substitution variables? (Choose two.)

A. A substitution variable can be used with any clause in a SELECT statement
B. A substitution variable used to prompt for a column name must be enclosed in double quotation marks
C. A substitution variable can be used only in a SELECT statement
D. A substitution variable used to prompt for a column name must be enclosed in a single quotation marks
E. A substitution variable prefixed with && prompts only once for a value in a session unless it is set to undefined in the session
F. A substitution variable prefixed with & always prompts only once for a value in a session

Answer: D,F

NEW QUESTION # 350
BOOK_SEQ is an existing sequence in your schema.
Which two CREATE TABLE commands are valid?
A)

B)

C)

D)

E)

A. Option D
B. Option C
C. Option B
D. Option E
E. Option A

Answer: C,D

NEW QUESTION # 351
Which statement will return a comma-separated list of employee names in alphabetical order for each department in the EMP table?

A. SELECT deptno,LISTAGG(ename, ', ') WITHIN GROUP (GROUP BY deptno) AS employee_list FROM emp ORDER BY ename;
B. SELECT deptno,LISTAGG(ename, ', ') WITHIN GROUP AS employee_list FROM emp GROUP BY deptno ORDER BY ename;
C. SELECT deptno,LISTAGG(ename, ', ') WITHIN GROUP (ORDER BY ename) AS employee_list FROM emp GROUP BY deptno;
D. SELECT deptno,LISTAGG(ename, ' , ') WITHIN GROUP AS employee_list FROM emp GROUP BY deptno;

Answer: C

NEW QUESTION # 352
Which two are true?

A. FLOOR returns the largest positive integer less than or equal to a specified number.
B. FLOOR returns the largest integer less than or equal to a specified number.
C. INSTR finds the offset within a character string, starting from position 0.
D. CONCAT joins two character strings together.
E. CONCAT joins two or more character strings together.
F. INSTR finds the offset within a string of a single character only.

Answer: B,E

Explanation:
The CONCAT function and FLOOR function in Oracle SQL have specific behaviors:
A). CONCAT function joins two or more character strings into one string, making this statement true.
B). FLOOR function returns the largest integer that is less than or equal to the specified number, making this statement true.
C). While CONCAT can join two strings together, this statement is incomplete as it can join more than two.
D). INSTR can find the offset of a substring within a string, not just a single character.
E). INSTR starts searching the string from position 1 in Oracle SQL, not position 0.
F). FLOOR does return the largest integer less than or equal to the specified number, but it can be any integer, not just positive ones.
References:
* Oracle Database SQL Language Reference, 12c Release 1 (12.1): "Single-Row Functions"

NEW QUESTION # 353
View and Exhibit and examine the structure and data in the INVOICE table. (Choose two.)

Which two statements are true regarding data type conversion in query expressions?

A. CONCAT(inv_amt, inv_date) : requires explicit conversion
B. inv_date > '01-02-2008' : uses implicit conversion
C. inv_amt = '0255982' : requires explicit conversion
D. inv_date = '15-february-2008' :uses implicit conversion
E. inv_no BETWEEN '101' AND '110' : uses implicit conversion

Answer: D,E

NEW QUESTION # 354
......

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