有关在SQL中删除带有双引号和已准备好的语句的问题

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('\"', ?, '\"');";