Pass Guaranteed Oracle - 1z1-071 - Exam Oracle Database SQL Bible

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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q432-Q437):

NEW QUESTION # 432
View the Exhibit and examine the structure in the EMPLOYEES tables.

Evaluate the following SQL statement:
SELECT employee_id, department_id
FROM employees
WHERE department_id= 50 ORDER BY department_id
UNION
SELECT employee_id, department_id
FROM employees
WHERE department_id=90
UNION
SELECT employee_id, department_id
FROM employees
WHERE department_id=10;
What would be the outcome of the above SQL statement?

A. The statement would execute successfully but it will ignore the ORDER BY clause and display the rows in random order.
B. The statement would execute successfully and display all the rows in the ascending order of DEPARTMENT_ID.
C. The statement would not execute because the ORDER BY clause should appear only at the end of the SQL statement, that is, in the last SELECT statement.
D. The statement would not execute because the positional notation instead of the column name should be used with the ORDER BY clause.

Answer: C

NEW QUESTION # 433
Which two statements are true regarding subqueries? (Choose two.)

A. There is no limit on the number of subquery levels in the WHERE clause of a SELECT statement.
B. A subquery can appear on either side of a comparison operator.
C. A subquery can be used only in SQL query statements.
D. A subquery can retrieve zero or more rows.
E. Only two subqueries can be placed at one level.

Answer: B,D

NEW QUESTION # 434
Which two statements are true about Data Manipulation Language (DML) statements?

A. AH INSERT INTO. . .VALUES. . statement can add multiple rows per execution to a table.
B. An INSERT INTO...VALUES..... statement can add a single row based on multiple conditions on a table.
C. A DELETE FROM ..... statement can remove rows based on only a single condition on a table.
D. A DELETE FROM..... statement can remove multiple rows based on multiple conditions on a table.
E. An UPDATE...SET.... statement can modify multiple rows based on only a single condition on a table.
F. An UPDATE...SET... statement can modify multiple rows based on multiple conditions on a table.

Answer: A,C

NEW QUESTION # 435
Which two statements are true regarding the SQL GROUP BY clause? (Choose two.)

A. Using the WHERE clause before the GROUP BY clause excludes rows before creating groups.
B. Using the WHERE clause after the GROUP BY clause excludes rows after creating groups.
C. You can use a column alias in the GROUP BY clause.
D. If the SELECT clause has an aggregating function, then columns without an aggregating function in the SELECT clause should be included in the GROUP BY clause.
E. The GROUP BY clause is mandatory if you are using an aggregating function in the SELECT clause.

Answer: A,D

NEW QUESTION # 436
View the Exhibit and examine the structure of ORDERS and CUSTOMERS tables.

There is only one customer with the cust_last_name column having value Roberts. Which INSERT statement should be used to add a row into the ORDERS table for the customer whose CUST_LAST_NAME is Roberts and CREDIT_LIMIT is 600?

A. INSERT INTO orders (order_id, order_data, order_mode,(SELECT customer_idFROM customersWHERE cust_last_name='Roberts' ANDcredit_limit=600), order_total)VALUES(1,
'10-mar-2007', 'direct', &&customer_id, 1000);
B. INSERT INTO(SELECT o.order_id, o.order_date, o.order_mode, c.customer_id, o.order_totalFROM orders o, customers cWHERE o.customer_id = c.customer_idAND c.cust_last_name='Roberts' AND c.credit_limit=600 )VALUES (1, '10-mar-2007', 'direct', (SELECT customer_idFROM customersWHERE cust_last_name='Roberts' ANDcredit_limit=600), 1000);
C. INSERT INTO ordersVALUES(1, '10-mar-2007', 'direct',(SELECT customer_idFROM customersWHERE cust_last_name='Roberts' ANDcredit_limit=600), 1000);
D. INSERT INTO orders (order_id, order_data, order_mode,(SELECT customer_idFROM customersWHERE cust_last_name='Roberts' ANDcredit_limit=600), order_total)VALUES (1,
'10-mar-2007', 'direct', &customer_id, 1000).

Answer: C

NEW QUESTION # 437
......

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