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Exam Code: 1Z0-051
Exam Name: Oracle Database: SQL Fundamentals I
Updated: Apr 13, 2017
Q&As: 292

Retrieving Data Using the SQL SELECT Statement 

  • List the capabilities of SQL SELECT statements
  • Execute a basic SELECT statement

Restricting and Sorting Data

  • Limit the rows that are retrieved by a query
  • Sort the rows that are retrieved by a query
  • Use ampersand substitution to restrict and sort output at runtime

Using Single-Row Functions to Customize Output 

  • Describe various types of functions available in SQL
  • Use character, number, and date functions in SELECT statements

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Real4exam Latest and Most Accurate Oracle 1Z0-051 Dumps Exam Q&As    

QUESTION 25
Evaluate the following SQL query;

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What would be the outcome?
A. 200
B. 16
C. 160
D. 150
E. 100
Correct Answer: C
Explanation
Explanation/Reference:
Explanation:
Function Purpose
ROUND(column|expression, n) Rounds the column, expression, or value to n decimal places or, if n is
omitted, no decimal places (If n is negative, numbers to the left of decimal point are rounded.)
TRUNC(column|expression, n) Truncates the column, expression, or value to n decimal places or, if n is
omitted, n defaults to zero

 

 

QUESTION 26
Which two statements are true regarding single row functions? (Choose two.)
A. They can be nested only to two levels
B. They always return a single result row for every row of a queried table
C. Arguments can only be column values or constant
D. They can return a data type value different from the one that is referenced
E. They accept only a single argument
Correct Answer: BD
Explanation
Explanation/Reference:
Explanation:
A function is a program written to optionally accept input parameters, perform an operation, or return a
single value. A function returns only one value per execution. Three important components form the basis
of defining a function. The first is the input parameter list. It specifies zero or more arguments that may be
passed to a function as input for processing. These arguments or parameters may be of differing data

types, and some are mandatory while others may be optional. The second component is the data type of
its resultant value. Upon execution, only one value is returned by the function. The third encapsulates the
details of the processing performed by the function and contains the program code that optionally
manipulates the input parameters, performs calculations and operations, and generates a return value.

 

 

QUESTION 27
Which statement is true regarding the UNION operator?
A. The number of columns selected in all SELECT statements need to be the same
B. Names of all columns must be identical across all SELECT statements
C. By default, the output is not sorted
D. NULL values are not ignored during duplicate checking
Correct Answer: A
Explanation
Explanation/Reference:
Explanation: 1Z0-051 dumps
The SQL UNION query allows you to combine the result sets of two or more SQL SELECT statements. It
removes duplicate rows between the various SELECT statements. Each SQL SELECT statement within
the UNION query must have the same number of fields in the result sets with similar data types.

 

 

QUESTION 28
Which two statements are true regarding working with dates? (Choose two.)
A. The default internal storage of dates is in the numeric format
B. The RR date format automatically calculates the century from the SYSDATE function but allows the
user to enter the century if required
C. The default internal storage of dates is in the character format
D. The RR date format automatically calculates the century from the SYSDATE function and does not
allow the user to enter the century
Correct Answer: AB
Explanation
Explanation/Reference:
Explanation:
Working with Dates
The Oracle Database stores dates in an internal numeric format, representing the century, year, month,
day, hours, minutes, and seconds.
The default display and input format for any date is DD-MON-RR.
RR Date Format
The RR date format is similar to the YY element, but you can use it to specify different centuries. Use the
RR date format element instead of YY so that the century of the return value varies according to the
specified two digit year and the last two digits of the current year. The table in the slide summarizes the
behavior of the RR element.

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Note the values shown in the last two rows of the above table. As we approach the middle of the century,
then the RR behavior is probably not what you want.
This data is stored internally as follows:
CENTURY YEAR MONTH DAY HOUR MINUTE SECOND 19 87 06 17 17 10 43

 

 

QUESTION 29
View the Exhibit and examine the structure of the CUSTOMERS table.

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NEW_CUSTOMERS is a new table with the columns CUST_ID, CUST_NAME and CUST_CITY that have
the same data types and size as the corresponding columns in the CUSTOMERS table.
Evaluate the following INSERT statement:

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The INSERT statement fails when executed. What could be the reason?
A. The VALUES clause cannot be used in an INSERT with a subquery
B. The total number of columns in the NEW_CUSTOMERS table does not match the total number of
columns in the CUSTOMERS table
C. The WHERE clause cannot be used in a sub query embedded in an INSERT statement
D. Column names in the NEW_CUSTOMERS and CUSTOMERS tables do not match
Correct Answer: A
Explanation
Explanation/Reference:
Explanation:
Copying Rows from Another Table
Write your INSERT statement with a subquery:
Do not use the VALUES clause.
Match the number of columns in the INSERT clause to those in the subquery. Inserts all the rows returned
by the subquery in the table, sales_reps

 

 

QUESTION 30
View the Exhibit and examine the description for the CUSTOMERS table.

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You want to update the CUST_CREDIT_LIMIT column to NULL for all the customers, where
CUST_INCOME_LEVEL has NULL in the CUSTOMERS table. Which SQL statement will accomplish the
task?
A. UPDATE customers
SET cust_credit_limit = NULL
WHERE CUST_INCOME_LEVEL = NULL;
B. UPDATE customers
SET cust_credit_limit = NULL
WHERE cust_income_level IS NULL;
C. UPDATE customers
SET cust_credit_limit = TO_NUMBER(NULL)
WHERE cust_income_level = TO_NUMBER(NULL);
D. UPDATE customers
SET cust_credit_limit = TO_NUMBER(‘ ‘,9999)
WHERE cust_income_level IS NULL;
Correct Answer: B
Explanation
Explanation/Reference:

 

 

QUESTION 31
Which two statements about sub queries are true? (Choose two.)
A. A sub query should retrieve only one row.
B. A sub query can retrieve zero or more rows.
C. A sub query can be used only in SQL query statements.
D. Sub queries CANNOT be nested by more than two levels.
E. A sub query CANNOT be used in an SQL query statement that uses group functions.
F. When a sub query is used with an inequality comparison operator in the outer SQL statement, the
column list in the SELECT clause of the sub query should contain only one column.
Correct Answer: BF
Explanation
Explanation/Reference: 1Z0-051 dumps
Explanation: sub query can retrieve zero or more rows, sub query is used with an inequality comparison
operator in the outer SQL statement, and the column list in the SELECT clause of the sub query should
contain only one column.
Incorrect answer:
A sub query can retrieve zero or more rows
C sub query is not SQL query statement
D sub query can be nested
E group function can be use with sub query

 

 

QUESTION 32
View the Exhibit and examine the structure of the PROMOTIONS table.

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You have to generate a report that displays the promo name and start date for all promos that started after
the last promo in the ‘INTERNET’ category.
Which query would give you the required output?
A. SELECT promo_name, promo_begin_date FROM promotions
WHERE promo_begin_date > ALL (SELECT MAX(promo_begin_date) FROM promotions ) AND
promo_category = ‘INTERNET’;
B. SELECT promo_name, promo_begin_date FROM promotions
WHERE promo_begin_date IN (SELECT promo_begin_date
FROM promotions
WHERE promo_category=’INTERNET’);
C. SELECT promo_name, promo_begin_date FROM promotions
WHERE promo_begin_date > ALL (SELECT promo_begin_date
FROM promotions
WHERE promo_category = ‘INTERNET’);
D. SELECT promo_name, promo_begin_date FROM promotions
WHERE promo_begin_date > ANY (SELECT promo_begin_date
FROM promotions
WHERE promo_category = ‘INTERNET’);
Correct Answer: C
Explanation
Explanation/Reference:

 

QUESTION 33
Which are /SQL*Plus commands? (Choose all that apply.)
A. INSERT
B. UPDATE
C. SELECT
D. DESCRIBE
E. DELETE
F. RENAME
Correct Answer: D
Explanation
Explanation/Reference:
Explanation:  1Z0-051 dumps
Describe is a valid iSQL*Plus/ SQL*Plus command.
INSERT, UPDATE & DELETE are SQL DML Statements. A SELECT is an ANSI Standard SQL Statement
not an iSQL*Plus Statement.
RENAME is a DDL Statement.

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