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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q227-Q232):

NEW QUESTION # 227
View the exhibit and examine the ORDERS table.
ORDERS
Name
Null?
Type
ORDER ID
NOT NULL
NUMBER(4)
ORDATE DATE
DATE
CUSTOMER ID
NUMBER(3)
ORDER TOTAL
NUMBER(7,2)
The ORDERS table contains data and all orders have been assigned a customer ID. Which statement would add a NOT NULL constraint to the CUSTOMER_ID column?

A. ALTER TABLE ordersADD customer_id NUMBER(6)CONSTRAINT orders_cust_id_nn NOT NULL;
B. ALTER TABLE ordersADD CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
C. ALTER TABLE ordersMODIFY customer_id CONSTRAINT orders_cust_nn NOT NULL (customer_id);
D. ALTER TABLE ordersMODIFY CONSTRAINT orders_cust_id_nn NOT NULL
(customer_id);

Answer: C

NEW QUESTION # 228
In the PROMOTIONS table, the PROMO_BEGTN_DATE column is of data type DATE and the default date format is DD-MON-RR.
Which two statements are true about expressions using PROMO_BEGIN_DATE contained in a query?

A. PROMO_BEGIN_DATE-SYSDATE will return an error.
B. PROMO_BEGIN_DATE-5 will return a date.
C. PROMO_BEGIN_DATE-SYSDATE will return a number.
D. TO_NUMBER(PROMO_BEGIN_DATE)-5 will return number
E. TO_DATE(PROMO_BEGIN_DATE * 5) will return a date

Answer: B,C

Explanation:
A). This statement is incorrect because TO_NUMBER expects a character string as an argument, not a date.
Directly converting a date to a number without an intermediate conversion to a character string would result in an error. B. This statement is incorrect. Multiplying a date by a number does not make sense in SQL, and attempting to convert such an expression to a date will also result in an error. C. This statement is correct.
Subtracting two dates in Oracle SQL results in the number of days between those dates, hence the result is a number. D. This statement is correct. Subtracting a number from a date in Oracle SQL will subtract that number of days from the date, returning another date. E. This statement is incorrect. As stated in C, subtracting a date from SYSDATE correctly returns the number of days between those two dates, not an error.
These concepts are explained in the Oracle Database SQL Language Reference, which details date arithmetic in SQL.

NEW QUESTION # 229
Which three statements are true about time zones, date data types, and timestamp data types in an Oracle database? (Choose three.)

A. The CURRENT_TIMESTAMP function returns data without time zone information.
B. The DBTIMEZONE function can return an offset from Universal Coordinated Time (UTC).
C. The SESSIONTIMEZONE function can return an offset from Universal Coordinated Time (UTC).
D. A TIMESTAMP data type column contains information about year, month, and day.
E. A TIMESTAMP WITH LOCAL TIMEZONE data type column is stored in the database using the time zone of the session that inserted the row.

Answer: A,B,C

Explanation:
https://docs.oracle.com/database/121/NLSPG/ch4datetime.htm

NEW QUESTION # 230
You execute this command:
TRUNCATE TABIE depts;
Which two are true?

A. A ROLLBACK statement can be used to retrieve the deleted data.
B. It always retains the space used by the removed rows.
C. It retains the indexes defined on the table.
D. It retains the integrity constraints defined on the table,
E. A FLASHBACK TABLE statement can be used to retrieve the deleted data.
F. It drops any triggers defined on the table.

Answer: C,D

NEW QUESTION # 231
Examine the commands used to create DEPARTMENT_DETAILSand COURSE_DETAILS tables:

You want to generate a list of all department IDs along with any course IDs that may have been assigned to them.
Which SQL statement must you use?
SELECT d.department_id, c.course_id FROM department_details d RIGHT OUTER

A. JOIN course_details c ON (d.department_id=c. department_id);
SELECT d.department_id, c.course_id FROM department_details d LEFT OUTER
B. department_details d ON (c.department_id=d. department_id);
SELECT d.department_id, c.course_id FROM department_details d RIGHT OUTER
C. JOIN course_details c ON (c.department_id=d. department_id);
D. JOIN course_details c ON (d.department_id=c. department_id);
SELECT d.department_id, c.course_id FROM course_details c LEFT OUTER JOIN

Answer: D

NEW QUESTION # 232
......

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