Question

I’m making a survey-applican with winforms and VB. This is the SQL I got so far to show statistics:

SELECT
    tblAlt.altText,
    Count(tblAnswers.answerID)
FROM tblAlt
LEFT JOIN tblAnswers ON (tblAlt.altId = tblAnswers.altID)
WHERE tblAlt.questionID = " & CInt(questionID) & "
GROUP BY tblAlt.altText;

This returns each alternatives for a question, and how many answered them. Is there a way I can count how many answered in total with the same SQL-query?

Tables involved are:

_______________     _______________     ___________  _______________
|_tblUsers____|     |_tblAnswers___|    |_tblAlt__|  |_tblQuestion_|
| userID      |     | answerAltID  |    | altID   |  | questID     |
| username    |     | userID       |    | altText |  | questText   |
|_____________|     |______________|    |_questID_|  |_____________|

Any help would be appreciated!

This is what I used in the end:

SELECT
tblAlt.altText,
Count(tblAnswers.answerID),
(SELECT COUNT(answerID) FROM tblAnswers, tblAlt 
WHERE tblAnswers.answerAltID = tblAlt.altID 
AND tblAlt.questID = " & CInt(questionID) & ") as total_count
FROM tblAlt
LEFT JOIN tblAnswers ON (tblAlt.altId = tblAnswers.altID)
WHERE tblAlt.questID = " & CInt(questionID) & "
GROUP BY tblAlt.altText;

Answer 1

you can use an subquery to do this, something like:

SELECT
tblAlt.altText,
Count(tblAnswers.answerID),
(SELECT COUNT(answerID) FROM tblAnswers) as total_count
FROM tblAlt
LEFT JOIN tblAnswers ON (tblAlt.altId = tblAnswers.altID)
WHERE tblAlt.questionID = " & CInt(questionID) & "
GROUP BY tblAlt.altText;

Some Resources:

http://beginner-sql-tutorial.com/sql-subquery.htm

http://www.1keydata.com/sql/sql-subquery.html