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1Z0-061 – Oracle University: https://education.oracle.com/oracle-database-12c-sql-fundamentals/pexam_1Z0-061

  • Oracle Database 11g Administrator Certified Associate
  • Oracle PL/SQL Developer Certified Associate
  • Oracle Database 12c Administrator Certified Associate

Free test Oracle Database 1Z0-061 Exam questions and Answers

QUESTION 1
You need to display the date ll-oct-2007 in words as `Eleventh of October, Two Thousand Seven\\’. Which SQL
statement would give the required result?lead4pass 1z0-061 exam question q1A. Option A
B. Option B
C. Option C
D. Option D
Correct Answer: C
The \\’11-oct-2007\\’ is a string not a date. We need to user the TO_DATE function and convert it to a date.


QUESTION 2
The STUDENT_GRADES table has these columns:
STUDENT_ID NUMBER(12)
SEMESTER_END DATE
GPA NUMBER(4, 3)
Which statement finds the highest grade point average (GPA) per semester?
A. SELECT MAX(gpa) FROM student_grades WHERE gpa IS NOT NULL;
B. SELECT (gpa) FROM student_grades GROUP BY semester_end WHERE gpa IS NOT NULL;
C. SELECT MAX(gpa) FROM student_grades WHERE gpa IS NOT NULL GROUP BY semester_end;
D. SELECT MAX(gpa) GROUP BY semester_end WHERE gpa IS NOT NULL FROM student_grades;
E. SELECT MAX(gpa) FROM student_grades GROUP BY semester_end WHERE gpa IS NOT NULL;
Correct Answer: C
For highest gpa value MAX function is needed, for result with per semester GROUP BY clause is needed Incorrect
answer:
A. per semester condition is not included
B. result would not display the highest gpa value D. invalid syntax error
E. invalid syntax error Refer: Introduction to Oracle9i: SQL, Oracle University Study Guide, 5-7


QUESTION 3
For which action can you use the TO_DATE function?
A. Convert any date literal to a date
B. Convert any numeric literal to a date
C. Convert any character literal to a date
D. Convert any date to a character literal
E. Format \\’10-JAN-99\\’ to `January 10 1999\\’
Correct Answer: C


QUESTION 4
You are currently located in Singapore and have connected to a remote database in Chicago.
You issue the following command:
Exhibit:

lead4pass 1z0-061 exam question q4

PROMOTIONS is the public synonym for the public database link for the PROMOTIONS table. What is the outcome?
A. Number of days since the promo started based on the current Singapore data and time.
B. An error because the ROUND function specified is invalid
C. An error because the WHERE condition specified is invalid
D. Number of days since the promo started based on the current Chicago data and time
Correct Answer: D


QUESTION 5
Examine the structure of the sales table:lead4pass 1z0-061 exam question q5A. The SALES1 table is created with no rows but only a structure.
B. The SALES1 table would have primary key and unique constraints on the specified columns.
C. The SALES1 table would not be created because of the invalid where clause.
D. The SALES1 table would have not null and unique constraints on the specified columns.
E. The SALES1 table would not be created because column-specified names in the select and create table clauses do
not match,
Correct Answer: AD
A: the WHERE clause 1=2 is false so no rows will be inserted into the new table.
D: The NOT NULL constraints will be included in the new table. There are no UNIQUE constraints.


QUESTION 6
You issue the following query:
SQL> SELECT AVG(MAX(qty))
FROM ord_items
GROUP BY item_no
HAVING AVG(MAX(qty))>50;
Which statement is true regarding the outcome of this query?
A. It executes successfully and gives the correct output.
B. It gives an error because the HAVING clause is not valid.
C. It executes successfully but does not give the correct output.
D. It gives an error because the GROUP BY expression is not valid.
Correct Answer: B
The general form of the SELECT statement is further enhanced by the addition of the HAVING clause and becomes:
SELECT column|expression|group_function(column|expression [alias]), …} FROM table
[WHERE condition(s)]
[GROUP BY {col(s)|expr}]
[HAVING group_condition(s)]
[ORDER BY {col(s)|expr|numeric_pos} [ASC|DESC] [NULLS FIRST|LAST]]; An important difference between the
HAVING clause and the other SELECT statement clauses is that it may only be specified if a GROUP BY clause is
present.
This dependency is sensible since group-level rows must exist before they can be restricted. The HAVING clause can
occur before the GROUP BY clause in the SELECT statement. However, it is more common to place the HAVING
clause
after the GROUP BY clause. All grouping is performed and group functions are executed prior to evaluating the
HAVING clause.


QUESTION 7
Which statement is true regarding sub queries?
A. The LIKE operator cannot be used with single- row subqueries.
B. The NOT IN operator is equivalent to IS NULL with single- row subqueries.
C. =ANY and =ALL operators have the same functionality in multiple- row subqueries.
D. The NOT operator can be used with IN, ANY, and ALL operators in multiple- row subqueries.
Correct Answer: D
Using the ANY Operator in Multiple-Row Subqueries The ANY operator (and its synonym, the SOME operator)
compares a value to each value returned by a subquery.
ANY means more than the minimum.
=ANY is equivalent to IN
Using the ALL Operator in Multiple-Row Subqueries The ALL operator compares a value to every value returned by a
subquery.
>ALL means more than the maximum and
SELECT cust_id, cust_last_name “Last Name”
FROM customers
WHERE country_id = 10
UNION
SELECT cust_id CUST_NO, cust_last_name
FROM customers
WHERE country_id = 30;
Which ORDER BY clause are valid for the above query? (Choose all that apply.)
A. ORDER BY 2, 1
B. ORDER BY CUST_NO
C. ORDER BY 2, cust_id
D. ORDER BY “CUST_NO”
E. ORDER BY “Last Name”
Correct Answer: AC
Using the ORDER BY Clause in Set Operations
-The ORDER BY clause can appear only once at the end of the compound query.
-Component queries cannot have individual ORDER BY clauses.
-The ORDER BY clause recognizes only the columns of the first SELECT query.
-By default, the first column of the first SELECT query is used to sort the output in an ascending order.


QUESTION 9
Which three statements are true regarding views? (Choose three.)
A. Views can be created only from tables.
B. Views can be created from tables or other views.
C. Only simple views can use indexes existing on the underlying tables.
D. Both simple and complex views can use indexes existing on the underlying tables.
E. Complex views can be created only on multiple tables that exist in the same schema.
F. Complex views can be created on multiple tables that exist in the same or different schemas.
Correct Answer: BDF
Creating a Sequence (continued)
CYCLE | NOCYCLE Specifies whether the sequence continues to generate values after reaching its maximum or
minimum value
(NOCYCLE is the default option.)
CACHE n | NOCACHE Specifies how many values the Oracle server preallocates and keeps in memory (By default, the
Oracle server caches 20 values.)


QUESTION 10
On your Oracle 12c database, you invoked SQL *Loader to load data into the EMPLOYEES table in the HR schema by
issuing the following command:
$> sqlldr hr/[email protected] table=employees
Which two statements are true regarding the command?
A. It succeeds with default settings if the EMPLOYEES table belonging to HR is already defined in the database.
B. It fails because no SQL *Loader data file location is specified.
C. It fails if the HR user does not have the CREATE ANY DIRECTORY privilege.
D. It fails because no SQL *Loader control file location is specified.
Correct Answer: AC
*SQL*Loader is invoked when you specify the sqlldr command and, optionally, parameters that establish session
characteristics.


QUESTION 11
Which statement is true regarding the UNION operator?
A. By default, the output is not sorted.
B. Null values are not ignored during duplicate checking.
C. Names of all columns must be identical across all select statements.
D. The number of columns selected in all select statements need not be the same.
Correct Answer: B
For the UNION operator the nulls values are not ignored during duplicate checking.
Incorrect:
Not A: The UNION operator implicitly sorts the output. Not D: Each SQL SELECT statement within the UNION query
must have the same number of fields in the result sets with similar data types.


QUESTION 12
You work as a database administrator at ABC.com. You study the exhibit carefully. Exhibit

lead4pass 1z0-061 exam question q12

Using the PROMOTIONS table, you need to display the names of all promos done after January 1, 2001 starting with
the latest promo. Which query would give the required result? (Choose all that apply.)
A. . SELECT promo_name, promo_begin_dateFROM promotionsWHERE promo_begin_date > \\’01-JAN-01\\’ORDER
BY 1 DESC;
B. SELECT promo_name, promo_begin_date “START DATE”FROM promotionsWHERE promo_begin_date >
\\’01-JAN-01\\’ORDER BY “START DATE” DESC;
C. . SELECT promo_name, promo_begin_dateFROM promotionsWHERE promo_begin_date > \\’01-JAN-01\\’ORDER
BY 2 DESC;
D. . SELECT promo_name, promo_begin_dateFROM promotionsWHERE promo_begin_date > \\’01-JAN-01\\’ORDER
BY promo_name DESC;
Correct Answer: BC


QUESTION 13
Which two statements are true regarding single row functions?
A. MOD: returns the quotient of a division
B. TRUNC: can be used with number and date values
C. CONCAT: can be used to combine any number of values
D. SYSDATE: returns the database server current date and time
E. INSTR: can be used to find only the first occurrence of a character in a string
F. TRIM: can be used to remove all the occurrences of a character from a string
Correct Answer: BD
ROUND: Rounds value to a specified decimal
TRUNC: Truncates value to a specified decimal
MOD: Returns remainder of division
SYSDATE is a date function that returns the current database server date and time.
Date-Manipulation Functions
Date functions operate on Oracle dates. All date functions return a value of the DATE data type except
MONTHS_BETWEEN, which returns a numeric value. MONTHS_BETWEEN(date1, date2): Finds the number of
months between date1
and date2. The result can be positive or negative. If date1 is later than date2, the result is positive; if date1 is earlier
than date2, the result is negative. The noninteger part of the result represents a portion of the month.
ADD_MONTHS(date, n): Adds n number of calendar months to date. The value of n must be an integer and can be
negative.
NEXT_DAY(date, \\’char\\’): Finds the date of the next specified day of the week (\\’char\\’) following date. The value of
char may be a number representing a day or a character string.
LAST_DAY(date): Finds the date of the last day of the month that contains date The above list is a subset of the
available date functions. ROUND and TRUNC number functions can also be used to manipulate the date values as
shown
below:
ROUND(date[, \\’fmt\\’]): Returns date rounded to the unit that is specified by the format model fmt. If the format model
fmt is omitted, date is rounded to the nearest day. TRUNC(date[, \\’fmt\\’]): Returns date with the time portion of the day
truncated to the unit that is specified by the format model fmt. If the format model fmt is omitted, date is truncated to the
nearest day.
The CONCAT Function
The CONCAT function joins two character literals, columns, or expressions to yield one larger character expression.
Numeric and date literals are implicitly cast as characters when they occur as parameters to the CONCAT function.
Numeric
or date expressions are evaluated before being converted to strings ready to be concatenated. The CONCAT function
takes two parameters. Its syntax is CONCAT(s1, s2), where s1 and s2 represent string literals, character column values,
or
expressions resulting in character values. The INSTR(source string, search item, [start position], [nth occurrence of
search item]) function returns a number that represents the position in the source string, beginning from the given start
position, where the nth occurrence of the search item begins:
instr(\\’http://www.domain.com\\’, \\’.\\’, 1, 2) = 18
The TRIM function literally trims off leading or trailing (or both) character strings from a given source string:

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