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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q331-Q336):

NEW QUESTION # 331
Examine this partial command:

Which two clauses are required for this command to execute successfully?

A. the DEFAULT DIRECTORYclause
B. the REJECT LIMITclause
C. the ACCESS PARAMETERSclause
D. the LOCATIONclause
E. the access driver TYPEclause

Answer: D,E

NEW QUESTION # 332
In the PROMOTIONS table, the PROMO_BEGIN_DATEcolumn is of data type DATEand the default date format is DD-MON-RR.
Which two statements are true about expressions using PROMO_BEGIN_DATEcontained a query? (Choose two.)

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

Answer: B,D

NEW QUESTION # 333
View the Exhibit and examine the description of the EMPLOYEEStable.

Evaluate the following SQL statement:
SELECT first_name, employee_id, NEXT_DAY(ADD_MONTHS(hire_date, 6), 1) "Review" FROM employees; The query was written to retrieve the FIRST_NAME, EMPLOYEE_ID,and review date for employees. The review date is the firsts Monday after the completion of six months of the hiring. The NLS_TERRITORY parameter is set to AMERICAin the session.
Which statement is true regarding this query?

A. The query would execute but the output would give review dates that are Sundays.
B. The query would not execute because the NEXT_DAYfunction accepts a string as argument.
C. The query would execute to give the desired output.
D. The query would not execute because date functions cannot be nested.

Answer: A

NEW QUESTION # 334
Which two statements are true about external tables?

A. Their data can be retrieved by using only SQL or PL/SQL.
B. DML statements cannot be used on them.
C. You can populate them from existing data in the database by using the CREATE TABLE AS SELECT command.
D. Their metadata and actual data are both stored outside the database.
E. Indexes can be created on them.

Answer: A,B

Explanation:
For external tables in Oracle:
* C. DML statements cannot be used on them: External tables are read-only in Oracle. They allow access to data in external sources as if it were within a table in the database, but they do not support DML operations (INSERT, UPDATE, DELETE).
* D. Their data can be retrieved by using only SQL or PL/SQL: You can query the data in external tables using SQL or PL/SQL, just as you would with regular database tables.
Incorrect options are:
* A: You cannot create indexes directly on external tables.
* B: External tables cannot be populated using the CREATE TABLE AS SELECT command since they are primarily meant for accessing data stored outside the database.
* E: Only the metadata of an external tables is stored in the database; the actual data remains in external files.

NEW QUESTION # 335
You need to display the first names of all customers from the CUSTOMERS table that contain the character `e' and have the character `a' in the second last position.
Which query would give the required output?

A. SELECT cust_first_name
FROM customers
WHERE INSTR(cust_first_name, `e')<>0 AND
SUBSTR(cust_first_name, LENGTH(cust_first_name), -2)='a';
B. SELECT cust_first_name
FROM customers
WHERE INSTR(cust_first_name, `e')<>0 AND
SUBSTR(cust_first_name, -2, 1)='a';
C. SELECT cust_first_name
FROM customers
WHERE INSTR(cust_first_name, `e')IS NOT NULL AND
SUBSTR(cust_first_name, 1, -2)='a';
D. SELECT cust_first_name
FROM customers
WHERE INSTR(cust_first_name, `e')<>'' AND
SUBSTR(cust_first_name, -2, 1)='a';

Answer: B

NEW QUESTION # 336
......

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