Question

sql="select * from book where id = ?

从数据库BOOK
表：BOOK
字段：XINDAO
值：new

Answer 1

如果是要显示所有新到书籍的话,从你的代码及图片判断应该是这样:
sql="select * from book where xindao='new'";

Answer 2

sql="select * from BOOK where xindao='new'";