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How to query SQL multi table query and joint query

2022-01-26 23:12:08 CSDN Q & A

There are two watches , One is the user answer sheet ( Store user answer records ) The other is the correct answer table ( Store correct answers )
         There are three questions , The first and second questions are single choice , Multiple choice of question 3  , All options are separated by commas , Ask for advice on how to check 

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This query can only look up a single question , If you choose more, you will report an error




Refer to the answer 1:

What is the error message ? You can view the query sql Is the code correct




Refer to the answer 2:

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