使用的是tp5.1
$cateObj=db('cate');
$cateRes=$cateObj->order('sort ASC')->select();
$cates=$cateObj->find(input('id'));
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$cateObj=db('cate');
$cates=$cateObj->find(input('id'));
$cateRes=$cateObj->order('sort ASC')->select();
请问一下上面两种写法得出的sql为什么不样呢？？

SELECT * FROM `fc_cate` WHERE `id` = 2 ORDER BY `sort` ASC
SELECT * FROM `fc_cate` WHERE `id` = 2 LIMIT 1
-----------------------------------------------------------------
SELECT * FROM `fc_cate` ORDER BY `sort` ASC
SELECT * FROM `fc_cate` WHERE `id` = 2 ORDER BY `sort` ASC LIMIT 1

$cates=db('cate')->find(input('id'));
直接这样写就没问题