SQL查询错误，请您帮忙提个意见（在线）！

我调用的这个查询语句sql="select  product.name,product.stocks,product.id,purseTable.id,purseTable.pId,purseTable.purseCount,purseTable.price,purseTable.getProductionName,purseTable.checkName,purseTable.purseDate  from  purseTable,product  order  by  purseTable.id  desc  "提示“参数不足，期待是1.请问怎么回事？