public int U_AppUser_Price(int id, decimal tg_price)

{

StringBuilder strSql = new StringBuilder();

strSql.Append("update dt_article set click=click-1 where id=" + id);

strSql.AppendFormat(";update a set a.amount=a.amount-{0} from dt_appusers a join dt_article b on a.id=b.user_id where b.id={1}",tg_price,id);//注意加分号和占位符

return DbHelperSQL.ExecuteSql(strSql.ToString());

}