100% Pass Oracle - Reliable 1z0-071 - Clear Oracle Database SQL Exam

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Oracle 1z0-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q377-Q382):

NEW QUESTION # 377
Which two true about a sql statement using SET operations such as UNION?

A. The data type of each column returned by the second query must be implicitly convertible to the data type of the corresponding column returned by the first query
B. The data type of each column retuned by the second query must exactly match the data type of the corresponding column returned by the first query
C. The names and number of columns must be identical for all SELECT statements in the query.
D. The data type group of each column returned by the second query must match the data type group of the corresponding column returned by the first query
E. The number, but not names, of columns must be identical for all SELECT statements in the query

Answer: A,E

NEW QUESTION # 378
View the Exhibit and examine the structure of the ORDERStable.

Which UPDATE statement is valid?
UPDATE orders

A. SET order_date = ’12-mar-2007’,
AND order_total = TO_NUMBER(NULL)
WHERE order_id = 2455;
UPDATE orders
B. SET order_date = ’12-mar-2007’,
order_total IS NULL
WHERE order_id = 2455;
UPDATE orders
C. SET order_date = TO_DATE(’12-mar-2007’,’dd-mon-yyyy’),
SET order_total = TO_NUMBER (NULL)
WHERE order_id = 2455;
D. SET order_date = ’12-mar-2007’,
order_total = NULL
WHERE order_id = 2455;
UPDATE orders

Answer: D

NEW QUESTION # 379
Which three statements are true about single-row functions? (Choose three.)

A. They can be used only in the WHERE clause of a SELECT statement
B. The data type returned can be different from the data type of the argument
C. The argument can be a column name, variable, literal or an expression
D. They can be nested to any level
E. They can accept only one argument
F. They return a single result row per table

Answer: B,C,D

Explanation:
https://www.folkstalk.com/2012/01/oracle-single-row-functions-examples.html

NEW QUESTION # 380
View the Exhibit and examine the structure of the CUSTOMERS table.

Using the CUSTOMERS table, you must generate a report that displays a credit limit increase of 15% for all customers.
Customers with no credit limit should have "Not Available" displayed.
Which SQL statement would produce the required result?

A. SELECT NVL (cust_credit_limit*.15, 'Not Available') "NEW CREDIT" FROM customers
B. SELECT NVL (TO_CHAR(cust_credit_limit*.15), 'Not Available') "NEW CREDIT" FROM customers
C. SELECT TO_CHAR(NVL(cust_credit_limit*.15), 'Not Available')) "NEW CREDIT" FROM customers
D. SELECT NVL (cust_credit_limit, 'Not Available')*.15 "NEW CREDIT" FROM customers

Answer: A

NEW QUESTION # 381
You want to write a query that prompts for two column names and the WHERE condition each time it is executed in a session but only prompts for the table name the first time it is executed.
The variables used in your query are never undefined in your session?
Which query can be used?

Answer: B

NEW QUESTION # 382
......

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