如何从joined中选择列？

Question

如何从joined中选择列？

$this->select('c.CurLevel''rl.Exp_C')->join($this->getData('sqlsrv3').'.dbo._RefLevel AS rl', 'c.CurLevel', '=', 'rl.Lvl+1');

我该怎么做rl.Level+1

Answer 1

选择上一列的表昵称：

$this->select(['c.CurLevel','rl.Exp_C'])
->join($this->getData('sqlsrv3').'.dbo._RefLevel AS rl', 'c.CurLevel', '=', 'rl.Lvl+1');