Question

I have a survey form and everytime someone completes the survey, a record is created in the survey_result table.

That table has a column for each question. Most are mutl-choice, some are free-text.

i.e. columns in table:

happy_or_sad (no. yes, sometimes)
are_you_busy (no, yes, sometimes)
your_suggestion 

Now I want to display a summary of the multi-choice answers that have been submitted.

Question: Happy or Sad?
no (40%) yes (20%) sometimes (40%)

(or at least a count if percentage is too much work). What would be the most effecient query or queries I could use to get this?

Answer 1

Try:

SELECT
    (SUM(happy_or_sad = 'no') / COUNT(*)) * 100 AS percentage_no,
    (SUM(happy_or_sad = 'yes') / COUNT(*)) * 100 AS percentage_yes,
    (SUM(happy_or_sad = 'sometimes') / COUNT(*)) * 100 AS percentage_sometimes,
FROM
    survey_result