报错信息如下：
11:42:42 ERROR: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 6<p>The sql is: SELECT * FROM
(
select a.account,c.date from zt_user a
left join
(
select account,date from zt_taskestimate
group by account,date
) as c on a.account = c.account
) as t oRdEr bY `date` desc </p> in D:\zentao\xampp\zentao\lib\base\dao\dao.class.php on line 1394, last called by D:\zentao\xampp\zentao\lib\base\dao\dao.class.php on line 388 through function sqlError.