select last data every day : <p>I have a table <code>CAD_CHANGES</code></p>

<pre><code>ID           OBJECT              U_ID                   CH_DATE

1            parcel               20               2017-08-02 15:25:56
2            parcel               20               2017-08-02 10:31:50
3            parcel               20               2017-08-02 18:21:45
4            building             20               2017-08-02 14:03:56
5            building             20               2017-08-02 12:10:10
6            parcel               20               2017-08-02 20:21:56
7            building             20               2017-08-02 21:05:05 
8            parcel               20               2017-08-02 09:14:27
9            parcel               20               2017-08-02 12:08:15
10           building             20               2017-08-03 14:09:26
11           building             20               2017-08-03 11:08:37
12           building             20               2017-08-03 18:01:48
13           building             20               2017-08-03 19:05:59
14           building             20               2017-08-03 21:28:02
15           building             20               2017-08-03 23:31:05
16           parcel               20               2017-08-03 09:34:07 
17           parcel               20               2017-08-03 20:21:08
18           parcel               20               2017-08-03 15:42:04
19           building             20               2017-08-03 10:51:37
20           parcel               20               2017-08-03 14:10:22
</code></pre>

<p>I want get result for example </p>

<pre><code>ID               OBJECT              U_ID                   CH_DATE
--------------------------------------------------------------------------
3                parcel               20              2017-08-02 18:21:45
7               building              20              2017-08-02 21:05:05
---------------------------------------------------------------------------
15              building              20              2017-08-03 23:31:05
17               parcel               20              2017-08-03 20:21:08
</code></pre>

<p>My table is big just I wrote only two days, please help solve the problem,
thank you in advance </p>

<p>( aaa bbb ccc ddd eee fff) </p>
