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The question mark is a placeholder in your sql statement that is given a real value when the statement is executed. Technically, you have the right amount, but you're missing parentheses and commas, and it's broken up throughout your query which i suspect is confusing sql. As a workaround, i'm using the following.
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Even just a list query shows nothing, i tried a lot of stuff i found on internet, i even asked ai for help, but it didn't work. Why are the names john/jane doe used as placeholder names instead of any other name? In postgres, the value placeholder is $#, which one is recommend when the value is the same, reusing the value placeholder or not?
For i, c := range columns { if i == 0 { *query += c placeholder += ? } else { *query += , +c placeholder += , ? } } placeholder += ) *query += ) + placeholder } // convert.
It seems the query is ok, but it returns empty list or a. In sql systems other than postgres, such as mysql for instance, prepared statements can use question marks as a placeholder. How to use placeholders in postgresql? A function 'placeholder' has been used in a true/false expression that is used as a table filter expression.
They're known as query parameters.