Answer simple quiz at the end of the blog post and -
Every day one winner from India will get Joes 2 Pros Volume 4.
Every day one winner from United States will get Joes 2 Pros Volume 4.
Note: If you want to setup the sample JProCo database on your system you can watch this video. For this post you will want to run the SQLProgrammingChapter5.1Setup.sql script from Volume 4.
Table-Valued Functions
Scalar-valued functions return a single value. Table-valued functions return tabular result sets (“tabular” meaning like a table). Table-valued functions look a lot like views because they both show us a tabular result set based on an underlying query. Table-valued functions can be based on one or more base tables.
Creating and Implementing Table-Valued Functions
The body of a table-valued function will essentially contain a query. Let’s begin with a query containing four fields and all of the records from the CurrentProducts table.
This query will become the heart of a new table-valued function, GetAllProducts. By placing the query within the set of parentheses after the keyword RETURN, we have the body of the function. The RETURNS TABLE keyword specifies that the table-valued function GetAllProducts must return the result in the form of a table.
CREATE FUNCTION GetAllProducts( )Just how do you query a table-valued function? The syntax is somewhat similar to how you would run a SELECT statement against a table or a view. All functions need to be called by using a set of parentheses with all required parameters inside them. If the function has no parameters (which is currently the case with GetAllProducts), then you will simply include an empty set of parentheses.
RETURNS TABLE
AS
RETURN
(SELECT ProductID, ProductName, RetailPrice, Category
FROM CurrentProducts)
GO
To view all of the table-valued functions contained in the JProCo database from within the Object Explorer tree, traverse this path:
OE > Databases > JProCo > Programmability > Functions > Table-valued Functions
Views versus Parameterized Table-Valued Functions
Views and table-valued functions are both useful ways to see the result set for a pre-defined query. There is no way to pass a variable into a view and change the way it runs. Views are hard-coded and their criterion does not change. A table-valued function can display different results by passing values into its parameter(s) at runtime. Let’s begin by selecting all ‘No-Stay’ records from the CurrentProducts table. We want to turn this query into a function and allow that function to pick the category.
We’re going to enclose our query in parentheses, indent it, and then add some code to create a function. We will create the GetCategoryProducts function which takes a @Category parameter. The query within the table-valued function will predicate on the value passed in when the function is called.
Change the parameter value to ‘Medium-stay’ and run this query. The GetCategoryProducts function now returns164 records.
SELECT * FROM GetCategoryProducts('Medium-stay')
Whenever you call a function, you must remember to use a set of parentheses and include the parameter(s) which the function expects. Let’s demonstrate the error message which results from forgetting to include the needed parameter within the parentheses. SQL Server’s error message tells us that our code doesn’t match the function’s parameter signature. In other words, it reminds us that we need to specify a category.
SELECT * FROM GetCategoryProducts()
Msg 313, Level 16, State 3, Line 1
An insufficient number of arguments were supplied for the procedure or function GetCategoryProducts.
Note: If you want to setup the sample JProCo database on your system you can watch this video. For this post you will want to run the SQLProgrammingChapter8.1Setup.sql script from Volume 4.
Question 26
You need to create two functions that will each return a scalar result of the number of hours each user has logged for: 1) the current day, and 2) month to date. You will pass in the user ID as a parameter value. What two things must you do?
- Create a function that returns a list of values representing the login times for a given user.
- Create a function that returns a list of values representing the people who have logged more hours than the current user has logged.
- Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
- Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Rules:
Please leave your answer in comment section below with correct option, explanation and your country of resident.
Every day one winner will be announced from United States.
Every day one winner will be announced from India.
A valid answer must contain country of residence of answerer.
Please check my facebook page for winners name and correct answer.
Every day one winner from India will get Joes 2 Pros Volume 4.
Every day one winner from United States will get Joes 2 Pros Volume 4.
The contest is open till next blog post shows up at http://blog.sqlauthority.com which is next day GTM+2.5.
Reference: Pinal Dave (http://blog.SQLAuthority.com)
Correct Answer : Option 3 & 4
We need two functions to get number of hours each user has logged for: 1) the current day, and 2) month to date.
Function for Current day
3) Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
Function for Month to date
4) Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Chennai, Tamilnadu, India
3) and 4)
3) Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4) Create a function that returns a number value representing the number of hours that a user has logged for the current month.
3) should gives hours for day
4) should give hours for the month
Leo Pius
USA
Hi,
Option 3 will work for Current Day and Option 4 will work for Month to Date. 2 functions are required to achieve this.
Option 1 and 2 are incorrect because they both return list of values and we are expected to create a function that return scalar value.
Thanks
Sudhir Chawla
New Delhi, India
The correct answers are 3 and 4
Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
Create a function that returns a number value representing the number of hours that a user has logged for the current month.
because we want to create this function as a scalar function
I am from USA
Answer would have two option this time which is 3 & 4
Ritesh (India)
Question 26
ANS :
3- Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4 – Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Chennai ,INDIA
Hi,
Answers are 3 and 4
Since its specified that the funtion should return a scalar result
Kerala, India
Answer is option 3 and 4
Shiv
USA
Correct answers are 3 and 4, because we need to return scalar values (one representing the number of hours each user has logged for the day, and the other one representing the number of hours each user has logged for month to date), and the other options return a list of values.
Rene Castro
El Salvador
The correct answer options are 3 & 4
Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Nikhildas
cochin
INDIA
Hi,
Correct Answer is
Opetion 3 and 4
Kaushik Modi,
I am from Ahmedabad,Gujarat,India
Answer: Option 3 and Optin 4
Explanation:
1)we’ll create a function eg: GetCurrentDayLoginHrs(@UserId int) this will returns the number of hours the users has been logged in current day as a scalar result.
2)again we need to create a function eg:GetLoginHrsCurrentMonth(@UserId int) which in turns returns the total logging hours of the users for the current month.
inside this we need to perform SUM(logging hours) for userid and where month would be current month.
Vishal Patwardhan
Indore(India)
Correct Answer : Option 3 & 4
3. Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4. Create a function that returns a number value representing the number of hours that a user has logged for the current month.
City: Baroda
Country: India
Thanks
GurjitSingh
As per the question, the functions should take user ID as parameter and return number of hours for 1) Current Date 2) Current Month.
Hence, we have to follow this steps.
3) Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4) Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Thus, Option 3 & 4 are the correct answers.
Ishan Shah,
Gandhinagar,
India
3 & 4 are correct
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Arjun,
India
answer is option 3 and 4
India
The correct answers are #3 & 4.
3. Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4. Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Country of residence: India
I will do:
a) Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
b) Create a function that returns a number value representing the number of hours that a user has logged for the current month.”
Option.
That means Option 3 and 4 are Correct Answers.
Thanks…
Rajneesh Verma
(INDIA)
Ans : 3 & 4
To find how many hours the user logged on in the current day we have create this function
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
And for total hours of the current month up to current date we have create this function
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Partha,
India
Hi,
As the requirement is to create two functions that will each return a scalar result of the number of hours each user has logged for: 1) the current day, and 2) month to date.
The answers would be : 3 & 4
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Name: Hema Chaudhry
Country : India
Thanks,
Hema Chaudhry
Correct Answer is Option 3 & 4.
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Country:India
Thanks ,
Fazal Vahora
The Correct Answers are:
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Explanation:
userID should be sent in as the Parameter to both the Functions.
Both the function will return a single value ie. scalar result.
(No.3) – for the current day
(No.4) – for the current month
Country:
India
The answer is option 3 and 4.
Since the question is to find out the number of hours the user has logged for current day and month to date.
We need to
Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Raj
USA
The two things we must do for this question are
Option 3 and 4
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Explanation: In this question we have to create two functions that returns scalar result and option 1 and 2 returns the list or tabular result. And option 3 and 4 returns single value as asked in the question.
Country – INDIA (Gujarat)
The Correct Answers for this question is Option -3 &4
Thanks,
Narendra(India)
Hi Sir,
3 and 4 are the correct answers.
According to question we need to return a scalar result of the number of hours each user has logged in
- Current day : for this the correct option is 3 that is
Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
This function will return the no of hours the user has logged in for the current day.
- month to date : for this the correct option is 4 that is
Create a function that returns a number value representing the number of hours that a user has logged for the current month.
This function will return the no of hours the user has logged in for the current month till date.
Regards,
P.Anish Shenoy
INDIA
The correct answers are:
Option 3:Option 3 is correct as the query has to return a scalar value(means single value) indicating the number of hours the user has logged for the current day. The query takes the user ID value for executing the query to calculate number of hours for a specific user, which is passed as a parameter to the function. Thus it gives hours for the current day.
Option 4:Option 4 is correct as the query has to return a scalar value(means single value) indicating the number of hours the user has logged for the current monthtodate. The query takes the user ID value for executing the query to calculate number of hours in the current monthtodate for a specific user, which is passed as a parameter to the function. Thus it gives hours for the current month to date.
Options 1 and 2 are not correct as the function returns a list of values.
Country of Residence: Andhra pradesh, India
Correct option is 3 & 4.
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Karan,
India
The correct answer is option 3 & 4
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Thanks,
Prasad Yangamuni
INDIA (PUNE)
The Correct options are 3 & 4:
3. Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4. Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Option 3 will return a scalar result of the number of hours each user has logged for the current day, and option 4 will return a scalar result of the current month
Regards,
Geetika Bhambri
Ahmedabad(Gujarat)-INDIA
Correct options : 3 & 4
3. Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4. Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Explanation: As we need to get “a scalar result of the number of hours each user has logged for: 1) the current day, and 2) month to date.”, only the above options return scalar values representing the number of hours. While the other two options returns a list of values, which we don’t need to get.
Country of resident: India
Correct Answer is # 3 & 4.
3. Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4. Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Because we need to return scalar values one for the current day and other for current month.
userID should be sent in as the Parameter to both the Functions. Both the function will return a single value ie. scalar result.
Answer # 3 – For the current day
Answer # 4 – For the current month
Gopalakrishnan Arthanarisamy
Unisys, Bangalore, India.
The correct answers are option 3 & 4.
Thanks,
Alpesh Gorasia
INDIA
Answer is option 3 and 4
Regards
Rajesh
From india
Thanks Pinal,
Correct Answer:
For Current Day :
3)Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
For Current Month:
4) Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Krishan kumar mishra
India
ANS: 3 And 4.
Explanation
=========
For Current day
Option : 3
Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
For month to date
Option : 4
Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Option 1 and 2 are incorrect because both return list of values not scalar value.
Thanks,
Mitesh Modi
(India)
Correct answer should be 3 & 4.
New Delhi
India
Answers 3 and 4
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that
Country : India
Qn 26) Correct option is : 3 and 4
— G.VenkateshPrabu || Bangalore || India
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Correct answer is option 3) & 4)
option 1) & 2) are clearly invalid as it is specified in the requirement that each function should return scalar values.Means each function should return single value.
Sumit
India
Options 3 & 4
USA
Mike Michalicek
Options 3 and 4 will be required to get the desired results.
Country: United States
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Somnath Desai
India
The answer would be #3 and #4
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
These are the only ones that satisfy the criteria given. You asked for the number of hours logged in in a current day or month, not the login times or people who have logged in more.
Deb
USA
the correct answer is option 3 and 4 i.e.
3- Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4 – Create a function that returns a number value representing the number of hours that a user has logged for the current month.
India
Answer: Option 3 & 4
Option 1 & 2 are incorrect since the question asked for scalar values to be returned and those options return multiple values. Only 3 and 4 return scalar values for the hours worked.
Country: USA
Ans : 3 & 4
to get the number of hours each user has logged the current day :-
3. Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
to get the number of hours each user has logged month to date :-
4. Create a function that returns a number value representing the number of hours that a user has logged for the current month.
—- India
The correct options are #3 and #4
Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
Create a function that returns a number value representing the number of hours that a user has logged for the current month.
options 1 and two both return lists and per the question we were to generate a scalar value.
Country of Residence: USA
correct answers are 3 and 4
i’m from india
3. Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4. Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Chetan – USA
Question 26) answers are 3 and 4
3) Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4) Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Diljeet Kumari
country : India
The answer is option 3 & 4, need 2 functions to meet the requirements stated in the question.
The answer is option 3 & 4, need 2 functions to meet the requirements stated in the question.
Ramdas
NC,USA
Answers: 3 and 4
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that
Country: India
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Gordon Kane
Allen TX
USA
Answer: Option 3 & 5
Query Here:
CREATE TABLE USER_LOGIN_HISTORY
(
USER_ID INT,
USER_LOGIN_TIME DATETIME,
USER_LOGOUT_TIME DATETIME
)
INSERT INTO USER_LOGIN_HISTORY VALUES(1, ’8/25/2011 11:00′, ’8/25/2011 12:00′)
INSERT INTO USER_LOGIN_HISTORY VALUES(1, ’8/25/2011 13:00′, ’8/25/2011 18:00′)
INSERT INTO USER_LOGIN_HISTORY VALUES(1, ’8/26/2011 11:00′, ’8/26/2011 12:00′)
INSERT INTO USER_LOGIN_HISTORY VALUES(1, ’8/26/2011 13:00′, ’8/26/2011 18:00′)
SELECT * FROM USER_LOGIN_HISTORY
CREATE FUNCTION [func_GET_NUMBER_OF_HOURS_TODAY_BY_USER](@USER_ID INT)
RETURNS INT
BEGIN
DECLARE @RESULT INT
SELECT @RESULT = SUM(DATEDIFF(HH, USER_LOGIN_TIME, USER_LOGOUT_TIME)) FROM USER_LOGIN_HISTORY
WHERE
[USER_ID] = @USER_ID
AND DATEDIFF(D, GETDATE(), USER_LOGIN_TIME) = 0
RETURN @RESULT
END
SELECT dbo.func_GET_NUMBER_OF_HOURS_TODAY_BY_USER(1) AS NUMBER_OF_HOURS_TODAY
CREATE FUNCTION [func_GET_NUMBER_OF_HOURS_CURRENT_MONTH_BY_USER](@USER_ID INT)
RETURNS INT
BEGIN
DECLARE @RESULT INT
SELECT @RESULT = SUM(DATEDIFF(HH, USER_LOGIN_TIME, USER_LOGOUT_TIME)) FROM USER_LOGIN_HISTORY
WHERE
[USER_ID] = @USER_ID
AND DATEDIFF(M, GETDATE(), USER_LOGIN_TIME) = 0
RETURN @RESULT
END
SELECT dbo.func_GET_NUMBER_OF_HOURS_CURRENT_MONTH_BY_USER(1) AS NUMBER_OF_HOURS_CURRENT_MONTH
-Devarajan (India).
Sorry the Answer: Option 3 & 4
Answers 3 and 4
Sreeram
India
Correct Answers is: Option 3 and 4
Thanks,
Basavaraj
India
answer for the Question 26 are #3 and #4.
Explanation:
Asked : We need to create two functions that will each return a scalar result of the number of hours each user has logged for:
A)the current day and
B) month to date
Given : You will pass in the user ID as a parameter value
Option 3)Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
A) this is perfect for the for Current Day
Option 4)Create a function that returns a number value representing the number of hours that a user has logged for the current month.
A) This works for the Month to Date.
Why other are wrong:
Option 1)Create a function that returns a list of values representing the login times for a given user.
A) We need a scalar value hence invalid
Option 2)Create a function that returns a list of values representing the people who have logged more hours than the current user has logged.
A) We need a scalar value hence invalid
Hence clearly option 3 and 4 are correct.
Dilip Kumar Jena
Country : INDIA
Answers are:
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Vinay,
Pune, INDIA
The correct options are 3 and 4
3. Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4. Create a function that returns a number value representing the number of hours that a user has logged for the current month.
(Sale, Nigeria)
Correct Answers => Option 3 and 4
answers 3 and 4
david
usa
Hi Pinal,
Challenge:
Question 26
You need to create two functions that will each return a scalar result of the number of hours each user has logged for: 1) the current day, and 2) month to date. You will pass in the user ID as a parameter value. What two things must you do?
1.Create a function that returns a list of values representing the login times for a given user.
2.Create a function that returns a list of values representing the people who have logged more hours than the current user has logged.
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Correct Answer:
The correct choices are #3 and #4.
Explanation:
Query #1 is incorrect. It will only return the login time for each user ID passed to it. The login time is only part of the solution (for a given login session). You also need to time the user logged off, then find the difference between the two values.
Query #2 will provide a list of users who have logged more hours than the current user. While this result set may be useful, it doesn’t meet our requirements.
Query #3 is the query we need to return the number of hours logged by the user ID for the current day.
Query #4 is the query we need to return the number of hours logged by the user from the beginning of the month through today.
Country:
United States
Thanks for the knowledge!
Regards,
Bill Pepping
Correct Answer -> 3 & 4
3) should gives hours for day
4) should give hours for the month
Country – > USA
The correct answer is:
3.Create a function that returns a numeric value representing the number of hours that a user has logged for the current day.
4.Create a function that returns a number value representing the number of hours that a user has logged for the current month.
Sudeepta,
India
Ummm
Options 3 and 4
From USA
options 3 and 4
from usa
A.) 3 and 4
Winner from USA: Gordan Kane
Winner from India: Kalyanasundaram.K
I thank you all for participating here. The permanent record of this update is posted on facebook page.
3 and 4
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