mysql query showing error: #1241 - Operand should contain 1 column(s)


mysql query showing error: #1241 - Operand should contain 1 column(s)



Mysql query,


SELECT qcat.name,
COUNT( CASE WHEN qas.state = "todo" THEN 1 END ) AS gtotal,
COUNT( CASE WHEN qas.state = "gradedright" THEN 1 END ) AS rightanswer,
COUNT( CASE WHEN qas.state = "gradedwrong" THEN 1 END ) AS wronganswer,
SUM(qas.fraction) AS grade,
quiza.id
FROM mdl_quiz_attempts quiza
JOIN mdl_question_attempts qa ON qa.questionusageid = quiza.uniqueid
JOIN mdl_question_attempt_steps qas ON qas.questionattemptid = qa.id
JOIN mdl_question qstn ON ( qa.`questionid` = qstn.id )
JOIN mdl_question_categories qcat ON ( qstn.`category` = qcat.id )
WHERE quiza.id=1173 and FIND_IN_SET(qstn.id, (1,2,3,4,5,6)) GROUP BY quiza.id,qcat.name



showing error: #1241 - Operand should contain 1 column(s)





Try replace FIND_IN_SET(qstn.id, (1,2,3,4,5,6)) with FIND_IN_SET(qstn.id, 1,2,3,4,5,6) (remove parenthesis)
– Felippe Duarte
Jun 29 at 17:31



FIND_IN_SET(qstn.id, (1,2,3,4,5,6))


FIND_IN_SET(qstn.id, 1,2,3,4,5,6)





not work showing , #1582 - Incorrect parameter count in the call to native function 'FIND_IN_SET' error
– Jatin Grover
Jun 29 at 17:33





My bad, Try replace FIND_IN_SET(qstn.id, (1,2,3,4,5,6)) with FIND_IN_SET(qstn.id, '1,2,3,4,5,6') (list as string)
– Felippe Duarte
Jun 29 at 17:34



FIND_IN_SET(qstn.id, (1,2,3,4,5,6))


FIND_IN_SET(qstn.id, '1,2,3,4,5,6')





no error but null output..thanks
– Jatin Grover
Jun 29 at 17:38






Well, there is where your error occurs. Now you need to write a query that return data.
– Felippe Duarte
Jun 29 at 17:40





2 Answers
2


SELECT qcat.name,
COUNT( CASE WHEN qas.state = "todo" THEN 1 END ) AS gtotal,
COUNT( CASE WHEN qas.state = "gradedright" THEN 1 END ) AS rightanswer,
COUNT( CASE WHEN qas.state = "gradedwrong" THEN 1 END ) AS wronganswer,
SUM(qas.fraction) AS grade,
quiza.id
FROM mdl_quiz_attempts quiza
JOIN mdl_question_attempts qa ON qa.questionusageid = quiza.uniqueid
JOIN mdl_question_attempt_steps qas ON qas.questionattemptid = qa.id
JOIN mdl_question qstn ON ( qa.`questionid` = qstn.id )
JOIN mdl_question_categories qcat ON ( qstn.`category` = qcat.id )
WHERE quiza.id=1173 and FIND_IN_SET(qstn.id, "1,2,3,4,5,6") GROUP BY quiza.id,qcat.name





Not work empty result..thanks
– Jatin Grover
Jun 29 at 17:41





Ithink you missed the position of the string like, " WHERE quiza.id=1173 and @@position_of_string = FIND_IN_SET(qstn.id, "1,2,3,4,5,6")"
– Satya Krishna
Jun 29 at 17:44






WHERE quiza.id=1173 and 1 = FIND_IN_SET(qstn.id, "1,2,3,4,5,6") GROUP BY quiza.id,qcat.name
– Satya Krishna
Jun 29 at 17:47





no output......
– Jatin Grover
Jun 29 at 17:57





execute the query by removing the "and FIND_IN_SET(qstn.id, "1,2,3,4,5,6")" in where clause and check are you getting any data or not
– Satya Krishna
Jun 29 at 18:00



This is wrong:


FIND_IN_SET(qstn.id, (1,2,3,4,5,6))



It should be:


qstn.id IN (1,2,3,4,5,6)



or:


qstn.id BETWEEN 1 AND 6



FIND_IN_SET() is used when the list of values is in a comma-separated string, IN is used with a literal list in the query.


FIND_IN_SET()


IN






By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Comments

Post a Comment

Popular posts from this blog

paramiko-expect timeout is happening after executing the command

paramiko-expect timeout is happening after executing the command Can someone help me why timeout is happening after executing the command .I am trying to SSH to a machine and execute a command.I want to store the result of the executed command . I have referred paramiko-timeout but i didn't get my expected result. import traceback try: import paramiko except ImportError: raise Exception("Please install paramiko , pip install paramiko") import pexpect from paramiko_expect import SSHClientInteraction def main(): HOSTNAME = "minion5.net" USERNAME = "root" PASSWORD = "help@432" PROMPT = "root@*:~$s+" try: client = paramiko.SSHClient() client.load_system_host_keys() client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) client.connect(hostname=HOSTNAME, username=USERNAME, password=PASSWORD) with SSHClientInteraction(client, timeout=20, display=True) as interact: ...
Read more

Opening a url is failing in Swift

Opening a url is failing in Swift breakpointing inside the callback and logging success shows false. I added itms-apps to my plist: LSApplicationQueriesSchemes and put this in my app delegate: func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool { return true } func moreTapped() { let url = NSURL(string: "itms-apps://itunes.com/developer/quantum-productions/id979315877") if #available(iOS 10.0, *) { UIApplication.shared.open(url! as URL, options: [:], completionHandler: {(success: Bool) in }) } else { UIApplication.shared.openURL(url! as URL) } } Are you testing on a real device? – rmaddy Jun 21 at 23:57 I try on a device, get "Cannot Connect to App Store". Device is online ...
Read more

Export result set on Dbeaver to CSV

Export result set on Dbeaver to CSV Normally I use Dbeaver for windows and always export my result set like this: run my query --> select the result --> export the result set --> select export to clipboard --> done This step by step puts my result set in my clipboard and I can paste it wherever I want to work with it. The problem is that now I am using dbeaver for mac and this guide is not working. I can go on until the moment that I select my result set like in the image below: exporting data set But once I go further in the process, in the last step I get: no query Note that in "source" it was suppose to show the query that originated the result set, but instead it says just "select. As a result it does't select my result or anything (besides being "successful"). Normally my query would show up there automatically and I couldn't find any option that corrects this problem in the menus. Please help me! Thanks. Aft...
Read more