请问下面“查询子句不完整”错在哪里啊id=Request.QueryString["id"].ToString();
tid=Request.QueryString["tid"].ToString();
string table=id+"topic";
string str="select * from '"+table+"',users where users.name='"+table+"'.tuser and '"+table+"'.id='"+tid+"'";
OleDbCommand cmd=new OleDbCommand(str,myconn);
OleDbDataReader red=cmd.ExecuteReader();