关于在SQL中使用双精度和准备好的语句删除ROM的问题

Question

我尝试在SQL中使用相同的bookID和userID删除一行，但是由于我的bookID用双引号保存，因此正常删除将不匹配。我该怎么办？谢谢。

String deleteString = "DELETE FROM booksFavourite WHERE userID=? AND bookID=?;";

        try {
            conn = DriverManager.getConnection("someLink");
            ps = conn.prepareStatement(deleteString);
            ps.setInt(1, userID);
            ps.setString(2, bookID);
            int r = ps.executeUpdate();
        }//try 
...

here is my sql table

Answer 1

您可以调整bookID，使其与您的参数匹配。

 String deleteString = "DELETE FROM booksFavourite WHERE userID=? AND trim(both '"' from bookID)=?;";

或

您可以在参数上将concat "匹配到bookID上>]

   String deleteString = "DELETE FROM booksFavourite WHERE userID=? AND bookID=concat('"', ?, '"');";