给定以下HTML/JS(http://jsfiddle.net/mgs_jsfiddle/gUhm2/)$(function(){functionViewModel(){varself=this;self.users=[{id:1,firstName:"Bob"},{id:2,firstName:"David"},{id:3,firstName:"Walter"}];self.selectedId=ko.observable(1);self.isSelected=function(user){returnuser.id===self.selectedId()?"YES":"NO";};

如何在不使用session变量的情况下在MySQL数据库中使用动态SQL语句？现在我有这样一段代码(在MySQL存储过程中):(...)DECLARETableNameVARCHAR(32);SET@SelectedId=NULL;SET@s:=CONCAT("SELECTIdINTO@SelectedIdFROM",TableName,"WHEREparam=valLIMIT1");PREPAREstmtFROM@s;EXECUTEstmt;DEALLOCATEPREPAREstmt;IFISNULL(@SelectedId)THEN(...)但我只想使用局部变量，这意味着我想开始这