I can't figure out what you want to do with the IFNULL() statement though?
But if I understand you correctly you want this:
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Can you use COALESCE instead within a CASE?
This will create what you are after, might be getting slow with large survey but it works if I understand your question correctly, included the .lss file from which survey I used it on
But if I understand you correctly you want this:
Can you use COALESCE instead within a CASE?
CREATE VIEW lime_view_925212 AS SELECT s.id 'id',s.submitdate 'submitdate',s.lastpage 'lastpage',s.startlanguage 'startlanguage',
s.925212X1X461 'multiOne',
CASE WHEN (COALESCE(s.925212X1X461, '')= '') THEN NULL ELSE (SELECT q.question from lime_questions q, lime_survey_925212 ls where q.qid=48 AND q.title='1' AND q.language='en' AND q.type='T' LIMIT 1) END AS 'multiOneText',
s.925212X1X462 'multiTwo',
CASE WHEN (COALESCE(s.925212X1X462, '')= '') THEN NULL ELSE (SELECT q.question from lime_questions q, lime_survey_925212 ls where q.qid=49 AND q.title='2' AND q.language='en' AND q.type='T' LIMIT 1) END AS 'multiTwoText',
s.925212X1X463 'multiThree',
CASE WHEN (COALESCE(s.925212X1X463, '')= '') THEN NULL ELSE (SELECT q.question from lime_questions q, lime_survey_925212 ls where q.qid=50 AND q.title='3' AND q.language='en' AND q.type='T' LIMIT 1) END AS 'multiThreeText',
s.925212X1X511 'multiNumOne',
CASE WHEN (COALESCE(s.925212X1X511, '')= '') THEN NULL ELSE (SELECT q.question from lime_questions q, lime_survey_925212 ls where q.qid=53 AND q.title='1' AND q.language='en' AND q.type='T' LIMIT 1) END AS 'multiNumOneText',
s.925212X1X512 'multiNumTwo',
CASE WHEN (COALESCE(s.925212X1X512, '')= '') THEN NULL ELSE (SELECT q.question from lime_questions q, lime_survey_925212 ls where q.qid=54 AND q.title='2' AND q.language='en' AND q.type='T' LIMIT 1) END AS 'multiNumTwoText',
s.925212X1X551 'ArrayQuestion1',
CASE WHEN (COALESCE(s.925212X1X551, '')= '') THEN NULL ELSE (SELECT a.answer from lime_answers a, lime_survey_925212 ls where a.qid=55 AND s.925212X1X551=a.code AND a.language='en' LIMIT 1) END AS 'ArrayQuestion1Text',
s.925212X1X552 'ArrayQuestion2',
CASE WHEN (COALESCE(s.925212X1X552, '')= '') THEN NULL ELSE (SELECT a.answer from lime_answers a, lime_survey_925212 ls where a.qid=55 AND s.925212X1X552=a.code AND a.language='en' LIMIT 1) END AS 'ArrayQuestion2Text'
FROM lime_survey_925212 sThis will create what you are after, might be getting slow with large survey but it works if I understand your question correctly, included the .lss file from which survey I used it on