关于在SQL中删除带双引号和预处理语句的行的问题

Question

我尝试删除 SQL 中具有相同 bookID 和 userID 的行，但是因为我的 bookID 保存时使用了双引号，所以正常删除不会成功'匹配。我应该怎么办？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 trim 您的 bookID 以便它匹配您的参数。

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

或

您可以 concat " 您的参数以匹配您的 bookID

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

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