Section 5 Quiz
(Answer
all questions in this section)
1. CASE
and DECODE evaluate expressions in a similar way to IF-THEN-ELSE logic.
However, DECODE is specific to Oracle syntax. True or False? Mark for Review
(1) Points
True
(*)
False
2. For
the given data from Employees (last_name, manager_id) what is the result of the
following statement:
DATA:( King, null
Kochhar, 100
De Haan, 100
Hunold, 102
Ernst, 103)
SELECT last_name,
DECODE(manager_id, 100, 'King', 'A N Other') "Works
For?"
FROM employees
Mark for Review
(1) Points
King,
A N Other
Kochhar, King
De Haan, King
Hunold, A N Other
Ernst, A N Other
(*)
King,
A N Other
Kochhar, King
De Haan, King
Hunold, Kochhar
Ernst, De Haan
Invalid
statement.
King,
Null
Kochhar, King
De Haan, King
Hunold, A N Other
Ernst, A N Other
3. Which
of the following is a conditional expression used in SQL? Mark for Review
(1) Points
NULLIF
WHERE
CASE
(*)
DESCRIBE
4. A
table has the following definition: EMPLOYEES(
EMPLOYEE_ID NUMBER(6) NOT NULL,
NAME VARCHAR2(20) NOT NULL,
MANAGER_ID VARCHAR2(6))
and contains the following rows:
(1001, 'Bob Bevan', '200')
(200, 'Natacha Hansen', null)
Will the folloiwng query work?
SELECT *
FROM employees
WHERE employee_id = manager_id; Mark for Review
(1) Points
Yes,
Oracle will perform implicit dataype conversion, and the query will return one
row of data.
Yes,
Oracle will perform implicit datatype conversion, but the WHERE clause will not
find any matching data. (*)
No.ï¾ You will have to re-wirte the statement and perform
explicit datatype conversion.
No,
because the datatypes of EMPLOYEE_ID and MANAGER_ID are different.
5. If you
use the RR format when writing a query using the date 27-Oct-17 and the year is
2001, what year would be the result?
Mark for Review
(1) Points
1901
2017
(*)
2001
1917
6. Which
arithmetic operation will return a numeric value? Mark for Review
(1) Points
SYSDATE
+ 30 / 24
NEXT_DAY(hire_date)
+ 5
SYSDATE
- 6
TO_DATE('01-Jun-2004')
- TO_DATE('01-Oct-2004') (*)
7. Which
SQL Statement should you use to display the prices in this format:
"$00.30"? Mark for
Review
(1) Points
SELECT
TO_CHAR(price, '$99,900.99')
FROM product;
(*)
SELECT
TO_NUMBER(price, '$99,900.99')
FROM product;
SELECT
TO_CHAR(price, '$99,990.99')
FROM product;
SELECT
TO_CHAR(price, '$99,999.99')
FROM product;
8. Which
two statements concerning SQL functions are true? (Choose two.) Mark for Review
(1) Points
(Choose
all correct answers)
Single-row
functions manipulate groups of rows to return one result per group of rows.
Conversion
functions convert a value from one data type to another data type. (*)
Not
all date functions return date values. (*)
Character
functions can accept numeric input.
Number
functions can return number or character values.
9. You
need to display the HIRE_DATE values in this format: 25th of July 2002. Which
SELECT statement would you use?
Mark for Review
(1) Points
SELECT
TO_CHAR(hire_date, 'DDspth 'of' Month RRRR')
FROM employees;
SELECT
TO_CHAR(hire_date, 'DDTH "of" Month YYYY')
FROM employees;
SELECT
TO_CHAR(hire_date, 'ddth "of" Month YYYY')
FROM employees;
(*)
SELECT
enroll_date(hire_date, 'DDspth "of" Month YYYY')
FROM employees;
10. Which function compares two expressions? Mark for Review
(1) Points
NVL
NVL2
NULL
NULLIF
(*)
11. Which of the following General Functions
will return the first non-null expression in the expression list? Mark for Review
(1) Points
NULLIF
COALESCE
(*)
NVL2
NVL
12. When executed, which statement displays
a zero if the TUITION_BALANCE value is zero and the HOUSING_BALANCE value is
null? Mark for Review
(1) Points
SELECT
NVL (tuition_balance + housing_balance, 0) "Balance Due"
FROM student_accounts;
(*)
SELECT
tuition_balance + housing_balance
FROM student_accounts;
SELECT
TO_NUMBER(tuition_balance, 0), TO_NUMBER (housing_balance, 0), tutition_balance
+ housing_balance "Balance Due"
FROM student_accounts;
SELECT
NVL(tuition_balance, 0), NVL (housing_balance), tuition_balance +
housing_balance "Balance Due"
FROM student_accounts;
13. Which statement about group functions is
true? Mark for Review
(1) Points
NVL
and COALESCE, but not NVL2, can be used with group functions to replace null
values.
COALESCE,
but not NVL and NVL2, can be used with group functions to replace null values.
NVL
and NVL2, but not COALESCE, can be used with group functions to replace null
values.
NVL,
NVL2, and COALESCE can be used with group functions to replace null values. (*)
14. Consider the following data in the
Employees table: (last_name, commission_pct, manager_id)
DATA:
King, null, null
Kochhar, null, 100
Vargas, null, 124
Zlotkey, .2, 100
What is the result of the following statement:
SELECT last_name, COALESCE(commission_pct, manager_id,
-1) comm
FROM employees ;
Mark for Review
(1) Points
King,
null
Kochhar, 100
Vargas, 124
Zlotkey, .2
King,
-1
Kochhar, 100
Vargas, 124
Zlotkey, .2
(*)
Statement
will fail
King,
-1
Kochhar, 100
Vargas, 124
Zlotkey, 100
15. You need to replace null values in the
DEPT_ID column with the text N/A. Which functions should you use? Mark for Review
(1) Points
TO_NUMBER
and NULLIF
TO_CHAR
and NULLIF
TO_CHAR
and NULL
TO_CHAR
and NVL (*)
1. All
Human Resources data is stored in a table named EMPLOYEES. You have been asked
to create a report that displays each employee's name and salary. Each
employee's salary must be displayed in the following format: $000,000.00. Which
function should you include in a SELECT statement to achieve the desired
result? Mark for Review
(1) Points
TO_DATE
TO_CHAR
(*)
TO_NUMBER
CHARTOROWID
2. The
EMPLOYEES table contains these columns:
EMPLOYEE_ID NUMBER(9)
LAST_NAME VARCHAR2 (25)
FIRST_NAME VARCHAR2 (25)
HIRE_DATE DATE
You need to display HIRE_DATE values in this format:
January 28, 2000
Which SQL statement could you use?
Mark for Review
(1) Points
SELECT
TO_CHAR(hire_date, 'Month DD', ' YYYY')
FROM employees;
SELECT
TO_CHAR(hire_date, 'Month DD, YYYY')
FROM employees;
(*)
SELECT
hire_date(TO_CHAR 'Month DD', ' YYYY')
FROM employees;
SELECT
TO_CHAR(hire_date, Month DD, YYYY)
FROM employees;
3. A
table has the following definition: EMPLOYEES(
EMPLOYEE_ID NUMBER(6) NOT NULL,
NAME VARCHAR2(20) NOT NULL,
MANAGER_ID VARCHAR2(6))
and contains the following rows:
(1001, 'Bob Bevan', '200')
(200, 'Natacha Hansen', null)
Will the folloiwng query work?
SELECT *
FROM employees
WHERE employee_id = manager_id; Mark for Review
(1) Points
Yes,
Oracle will perform implicit dataype conversion, and the query will return one
row of data.
No,
because the datatypes of EMPLOYEE_ID and MANAGER_ID are different.
Yes,
Oracle will perform implicit datatype conversion, but the WHERE clause will not
find any matching data. (*)
No.ï¾ You will have to re-wirte the statement and perform
explicit datatype conversion.
4. Which
statement is true about SQL functions?
Mark for Review
(1) Points
Functions
can convert values or text to another data type.
Functions
can round a number to a specified decimal place.
Functions
can convert upper case characters to lower case characters.
a, b
and c are true. (*)
None
of the above statements are true.
5. The
following script will run successfully. True or False?
SELECT TO_CHAR(TO_DATE('25-Dec-2004','dd-Mon-yyyy'))
FROM dual
Mark for Review
(1) Points
True
(*)
False
6. Which
three statements concerning explicit data type conversions are true? (Choose
three.) Mark for Review
(1) Points
(Choose
all correct answers)
Use
the TO_NUMBER function to convert a character string of digits to a number. (*)
Use
the TO_CHAR function to convert a number or date value to a character string.
(*)
Use
the TO_DATE function to convert a character string to a date value. (*)
Use
the TO_DATE function to convert a date value to a character string or number.
Use
the TO_NUMBER function to convert a number to a character string.
7. Which
function compares two expressions?
Mark for Review
(1) Points
NULL
NVL2
NVL
NULLIF
(*)
8. The
following statement returns 0 (zero). True or False?
SELECT 121/NULL
FROM dual;
Mark for Review
(1) Points
True
False
(*)
9. When
executed, which statement displays a zero if the TUITION_BALANCE value is zero
and the HOUSING_BALANCE value is null?
Mark for Review
(1) Points
SELECT
tuition_balance + housing_balance
FROM student_accounts;
SELECT
NVL(tuition_balance, 0), NVL (housing_balance), tuition_balance +
housing_balance "Balance Due"
FROM student_accounts;
SELECT
TO_NUMBER(tuition_balance, 0), TO_NUMBER (housing_balance, 0), tutition_balance
+ housing_balance "Balance Due"
FROM student_accounts;
SELECT
NVL (tuition_balance + housing_balance, 0) "Balance Due"
FROM student_accounts;
(*)
10. You need to replace null values in the
DEPT_ID column with the text N/A. Which functions should you use? Mark for Review
(1) Points
TO_NUMBER
and NULLIF
TO_CHAR
and NULLIF
TO_CHAR
and NULL
TO_CHAR
and NVL (*)
11. Which statement about group functions is
true? Mark for Review
(1) Points
NVL
and COALESCE, but not NVL2, can be used with group functions to replace null
values.
NVL
and NVL2, but not COALESCE, can be used with group functions to replace null
values.
NVL,
NVL2, and COALESCE can be used with group functions to replace null values. (*)
COALESCE,
but not NVL and NVL2, can be used with group functions to replace null values.
12. With the following data in Employees
(last_name, commission_pct, manager_id) what is the result of the following
statement?
DATA:
King, null, null
Kochhar, null, 100
Vargas, null, 124
Zlotkey, .2, 100
SELECT last_name, NVL2(commission_pct, manager_id, -1)
comm
FROM employees ;
Mark for Review
(1) Points
King,
-1
Kochhar, -1
Vargas, -1
Zlotkey, 100
(*)
Statement
will fail.
King,
-1
Kochhar, -1
Vargas, -1
Zlotkey, .2
King,
-1
Kochhar, 100
Vargas, 124
Zlotkey, .2
13. Which statement will return a listing of
last names, salaries, and a rating of 'Low', 'Medium', 'Good' or 'Excellent'
depending on the salary value?
Mark for Review
(1) Points
SELECT
last_name,salary,
(CASE WHEN salary<5000 o:p="" ow="" then="">
WHEN
salary<10000 edium="" o:p="" then="">
WHEN
salary<20000 o:p="" ood="" then="">
ELSE
'Excellent'
END) qualified_salary
FROM employees;
(*)
SELECT
last_name,sal,
(CASE WHEN sal<5000 o:p="" ow="" then="">
WHEN sal<10000 edium="" o:p="" then="">
WHEN
sal<20000 o:p="" ood="" then="">
ELSE
'Excellent'
END) qualified_salary
FROM employees;
SELECT
last_name,salary,
(RATING WHEN salary<5000 o:p="" ow="" then="">
WHEN
salary<10000 edium="" o:p="" then="">
WHEN
salary<20000 o:p="" ood="" then="">
ELSE
'Excellent'
END) qualified_salary
FROM employees;
SELECT
last_name,salary,
(CASE WHEN salary<5000 o:p="" ow="" then="">
WHEN sal
<10000 edium="" o:p="" then="">
WHEN sal
<20000 o:p="" ood="" then="">
ELSE
'Excellent'
END) qualified_salary
FROM employees;
14. Which of the following is a conditional
expression used in SQL? Mark for Review
(1) Points
CASE
(*)
NULLIF
DESCRIBE
WHERE
15. For the given data from Employees
(last_name, manager_id) what is the result of the following statement:
DATA:( King, null
Kochhar, 100
De Haan, 100
Hunold, 102
Ernst, 103)
SELECT last_name,
DECODE(manager_id, 100, 'King', 'A N Other') "Works
For?"
FROM employees
Mark for Review
(1) Points
King,
A N Other
Kochhar, King
De Haan, King
Hunold, A N Other
Ernst, A N Other
(*)
Invalid
statement.
King,
Null
Kochhar, King
De Haan, King
Hunold, A N Other
Ernst, A N Other
King,
A N Other
Kochhar, King
De Haan, King
Hunold, Kochhar
Ernst, De Haan
1. Sysdate
is 12-May-2004.
You need to store the following date: 7-Dec-89
Which statement about the date format for this value is
true? Mark for Review
(1) Points
The
RR date format will interpret the year as 1989, and the YY date format will
interpret the year as 2089 (*)
Both
the YY and RR date formats will interpret the year as 2089
The
RR date format will interpret the year as 2089, and the YY date format will
interpret the year as 1989
Both
the YY and RR date formats will interpret the year as 1989
2. Which
functions allow you to perform explicit data type conversions? Mark for Review
(1) Points
TO_CHAR,
TO_DATE, TO_NUMBER (*)
LENGTH,
SUBSTR, LPAD, TRIM
NVL,
NVL2, NULLIF
ROUND,
TRUNC, ADD_MONTHS
3. Which
statement will return the salary (for example, the salary of 6000) from the
Employees table in the following format?
$6000.00 Mark for Review
(1) Points
SELECT
TO_CHAR(sal, '$99999.00') SALARY
FROM employees
SELECT
TO_CHAR(salary, '$99999') SALARY
FROM employees
SELECT
TO_CHAR(salary, '99999.00') SALARY
FROM employees
SELECT
TO_CHAR(salary, '$99999.00') SALARY
FROM employees
(*)
4. The
EMPLOYEES table contains these columns:
EMPLOYEE_ID NUMBER(9)
LAST_NAME VARCHAR2 (25)
FIRST_NAME VARCHAR2 (25)
HIRE_DATE DATE
You need to display HIRE_DATE values in this format:
January 28, 2000
Which SQL statement could you use?
Mark for Review
(1) Points
SELECT
TO_CHAR(hire_date, Month DD, YYYY)
FROM employees;
SELECT
TO_CHAR(hire_date, 'Month DD', ' YYYY')
FROM employees;
SELECT
TO_CHAR(hire_date, 'Month DD, YYYY')
FROM employees;
(*)
SELECT
hire_date(TO_CHAR 'Month DD', ' YYYY')
FROM employees;
5. If you
use the RR format when writing a query using the date 27-Oct-17 and the year is
2001, what year would be the result?
Mark for Review
(1) Points
2017
(*)
1901
1917
2001
6. Which
three statements concerning explicit data type conversions are true? (Choose
three.) Mark for Review
(1) Points
(Choose
all correct answers)
Use
the TO_DATE function to convert a character string to a date value. (*)
Use
the TO_CHAR function to convert a number or date value to a character string.
(*)
Use
the TO_DATE function to convert a date value to a character string or number.
Use
the TO_NUMBER function to convert a character string of digits to a number. (*)
Use
the TO_NUMBER function to convert a number to a character string.
7. Which
statement will return a listing of last names, salaries, and a rating of 'Low',
'Medium', 'Good' or 'Excellent' depending on the salary value? Mark for Review
(1) Points
SELECT
last_name,salary,
(CASE WHEN salary<5000 o:p="" ow="" then="">
WHEN
salary<10000 edium="" o:p="" then="">
WHEN
salary<20000 o:p="" ood="" then="">
ELSE
'Excellent'
END) qualified_salary
FROM employees;
(*)
SELECT
last_name,salary,
(RATING WHEN salary<5000 o:p="" ow="" then="">
WHEN
salary<10000 edium="" o:p="" then="">
WHEN
salary<20000 o:p="" ood="" then="">
ELSE
'Excellent'
END) qualified_salary
FROM employees;
SELECT
last_name,salary,
(CASE WHEN salary<5000 o:p="" ow="" then="">
WHEN sal
<10000 edium="" o:p="" then="">
WHEN sal
<20000 o:p="" ood="" then="">
ELSE
'Excellent'
END) qualified_salary
FROM employees;
SELECT
last_name,sal,
(CASE WHEN sal<5000 o:p="" ow="" then="">
WHEN
sal<10000 edium="" o:p="" then="">
WHEN
sal<20000 o:p="" ood="" then="">
ELSE
'Excellent'
END) qualified_salary
FROM employees;
8. For
the given data from Employees (last_name, manager_id) what is the result of the
following statement:
DATA:( King, null
Kochhar, 100
De Haan, 100
Hunold, 102
Ernst, 103)
SELECT last_name,
DECODE(manager_id, 100, 'King', 'A N Other') "Works
For?"
FROM employees
Mark for Review
(1) Points
King,
A N Other
Kochhar, King
De Haan, King
Hunold, A N Other
Ernst, A N Other
(*)
King,
Null
Kochhar, King
De Haan, King
Hunold, A N Other
Ernst, A N Other
Invalid
statement.
King,
A N Other
Kochhar, King
De Haan, King
Hunold, Kochhar
Ernst, De Haan
9. Which
of the following is a conditional expression used in SQL? Mark for Review
(1) Points
DESCRIBE
CASE
(*)
NULLIF
WHERE
10. Which function compares two expressions? Mark for Review
(1) Points
NVL
NULL
NULLIF
(*)
NVL2
11. Which statement about group functions is
true? Mark for Review
(1) Points
NVL
and NVL2, but not COALESCE, can be used with group functions to replace null
values.
COALESCE,
but not NVL and NVL2, can be used with group functions to replace null values.
NVL
and COALESCE, but not NVL2, can be used with group functions to replace null
values.
NVL,
NVL2, and COALESCE can be used with group functions to replace null values. (*)
12. When executed, which statement displays
a zero if the TUITION_BALANCE value is zero and the HOUSING_BALANCE value is
null? Mark for Review
(1) Points
SELECT
tuition_balance + housing_balance
FROM student_accounts;
SELECT
NVL (tuition_balance + housing_balance, 0) "Balance Due"
FROM student_accounts;
(*)
SELECT
NVL(tuition_balance, 0), NVL (housing_balance), tuition_balance +
housing_balance "Balance Due"
FROM student_accounts;
SELECT
TO_NUMBER(tuition_balance, 0), TO_NUMBER (housing_balance, 0), tutition_balance
+ housing_balance "Balance Due"
FROM student_accounts;
13. You need to replace null values in the
DEPT_ID column with the text N/A. Which functions should you use? Mark for Review
(1) Points
TO_NUMBER
and NULLIF
TO_CHAR
and NULL
TO_CHAR
and NULLIF
TO_CHAR
and NVL (*)
14. Consider the following data in the
Employees table: (last_name, commission_pct, manager_id)
DATA:
King, null, null
Kochhar, null, 100
Vargas, null, 124
Zlotkey, .2, 100
What is the result of the following statement:
SELECT last_name, COALESCE(commission_pct, manager_id,
-1) comm
FROM employees ;
Mark for Review
(1) Points
King,
-1
Kochhar, 100
Vargas, 124
Zlotkey, 100
Statement
will fail
King,
null
Kochhar, 100
Vargas, 124
Zlotkey, .2
King,
-1
Kochhar, 100
Vargas, 124
Zlotkey, .2
(*)
15. The STYLES table contains this data:
STYLE_ID STYLE_NAME CATEGORY COST
895840 SANDAL 85940 12.00
968950 SANDAL 85909 10.00
869506 SANDAL 89690 15.00
809090 LOAFER 89098 10.00
890890 LOAFER 89789 14.00
857689 HEEL 85940 11.00
758960 SANDAL 86979
Evaluate this SELECT statement:
SELECT style_id, style_name, category, cost
FROM styles
WHERE style_name LIKE 'SANDAL' AND NVL(cost, 0) <
15.00
ORDER BY category, cost;
Which result will the query provide?
Mark for Review
(1) Points
STYLE_ID STYLE_NAME CATEGORY COST
968950 SANDAL 85909 10.00
895840 SANDAL 85940 12.00
758960 SANDAL 86979
(*)
STYLE_ID STYLE_NAME CATEGORY COST
895840 SANDAL 85909 12.00
968950 SANDAL 85909 10.00
758960 SANDAL 86979
869506 SANDAL 89690 15.00
STYLE_ID STYLE_NAME CATEGORY COST
895840 SANDAL 85940 12.00
968950 SANDAL 85909 10.00
758960 SANDAL 86979
STYLE_ID STYLE_NAME CATEGORY COST
895840 SANDAL 85909 12.00
968950 SANDAL 85909 10.00
869506 SANDAL 89690 15.00
758960 SANDAL 86979
Which statement concerning single row functions is true? Mark for Review
BalasHapus(1) Points
Single row functions return one or more results per row.
Single row functions can be nested. (*)
Single row functions cannot modify a data type.
Single row functions can accept only one argument, but can return multiple values.
What is the result of the following statement:
BalasHapusSELECT last_name, COALESCE(commission_pct, manager_id, -1) comm
FROM employees ;
Mark for Review
(1) Points
King, -1
Kochhar, 100
Vargas, 124
Zlotkey, .2
(*)
Statement will fail
King, null
Kochhar, 100
Vargas, 124
Zlotkey, .2
King, -1
Kochhar, 100
Vargas, 124
Zlotkey, 100
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The PRODUCT table contains this column: PRICE NUMBER(7,2)
BalasHapusEvaluate this statement:
SELECT NVL(10 / price, '0')
FROM PRODUCT;
What would happen if the PRICE column contains null values?
The statement would fail because values cannot be divided by 0.
A value of 0 would be displayed. (*)
A value of 10 would be displayed.
The statement would fail because values cannot be divided by null.
With the following data in Employees (last_name, commission_pct, manager_id) what is the result of the following statement?
BalasHapusDATA:
King, null, null
Kochhar, null, 100
Vargas, null, 124
Zlotkey, .2, 100
SELECT last_name, NVL2(commission_pct, manager_id, -1) comm
FROM employees ;
King, -1
Kochhar, 100
Vargas, 124
Zlotkey, .2
Statement will fail.
King, -1
Kochhar, -1
Vargas, -1
Zlotkey, 100
(*)
King, -1
Kochhar, -1
Vargas, -1
Zlotkey, .2
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BalasHapus4. What three statements are true about explicit data type conversions? (Select three.)
BalasHapus(Choose all correct answers)
(0/1) Points
Use the TO_DATE function to convert a date value to a character string or a number.
Use the TO_NUMBER function to convert a number to a character string.
Use the TO_DATE function to convert a character string to a date value. (*)
Use the TO_CHAR function to convert a numeric or date value to a character string. (*)
Use the TO_NUMBER function to convert a character string from digits to a number. (*)
10. With the following Employees data (last_name, commission_pct, manager_id), what is the result of the following statement?
DATA:
King, null, null
Kochhar, null, 100
Vargas, null, 124
Zlotkey, .2, 100
SELECT last_name, NVL2 (commission_pct, manager_id, -1) comm
FROM employees;
(0/1) Points
The sentence will fail.
King, -1
Kochhar, 100
Vargas, 124
Zlotkey, .2
King, -1
Kochhar, -1
Vargas, -1
Zlotkey, 100 (*)
King, -1
Kochhar, -1
Vargas, -1
Zlotkey, .2
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Which best describes the TO_CHAR function?
BalasHapusThe TO_CHAR function can only be used on Date columns.
The TO_CHAR function can be used to specify meaningful column names in an SQL statement's result set.
The TO_CHAR function can be used to display dates and numbers according to formatting conventions that are supported by Oracle. (*)
The TO_CHAR function can be used to remove text from column data that will be returned by the database.
You have been asked to create a report that lists all customers who have placed orders of at least $2,500. The report's date should be displayed using this format:
BalasHapusDay, Date Month, Year (For example, Tuesday, 13 April, 2004 ).
Which statement should you issue?
SELECT companyname, TO_CHAR (sysdate, 'fmdd, dy month, yyyy'), total
FROM customers NATURAL JOIN orders
WHERE total >= 2500;
SELECT companyname, TO_DATE (sysdate, 'dd, dy month, yyyy'), total
FROM customers NATURAL JOIN orders
WHERE total >= 2500;
SELECT companyname, TO_CHAR (sysdate, 'fmDay, dd Month, yyyy'), total
FROM customers NATURAL JOIN orders
WHERE total >= 2500; (*)
SELECT companyname, TO_DATE (date, 'day, dd month, yyyy'), total
FROM customers NATURAL JOIN orders
WHERE total >= 2500;
The EMPLOYEES table contains these columns:
BalasHapusEMPLOYEE_ID NUMBER(9)
LAST_NAME VARCHAR2 (25)
FIRST_NAME VARCHAR2 (25)
SALARY NUMBER(6)
You need to create a report to display the salaries of all employees. Which SQL Statement should you use to display the salaries in format: "$45,000.00"?
SELECT TO_CHAR(salary, '$999,999')
FROM employees;
SELECT TO_NUM(salary, '$999,990.99')
FROM employees;
SELECT TO_NUM(salary, '$999,999.00')
FROM employees;
SELECT TO_CHAR(salary, '$999,999.00')
FROM employees; (*)