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MySQL Error “Operand should contain 1 column”

2 This question already has answers here: Operand Should Contain 1 Column – MySQL NOT IN (3 answers) Closed 7 years ago. I could find a lot of similar questions but no real solution for my problem. My SQL query: The error code I receive is If I just use the query in the parentheses … Read more

MySQL – Operand should contain 1 column(s)

Your subquery is selecting two columns, while you are using it to project one column (as part of the outer SELECT clause). You can only select one column from such a query in this context. Consider joining to the users table instead; this will give you more flexibility when selecting what columns you want from … Read more