copy data table with specific column

I am working on a website, in which on button click i have two table, In first datatable i have a record from 1 to 31 , in second datatable i have record only 23 and 24.

 

Now i have to copy of value second datatable  23 and 24  in first data table.

 

I am mergiing the table now it is printing 33 record 

 

please check and help.

 

 

Date	In Time	Out Time
01/12/2019
02/12/2019
03/12/2019
04/12/2019
05/12/2019
06/12/2019
07/12/2019
08/12/2019
09/12/2019
10/12/2019
11/12/2019
12/12/2019
13/12/2019
14/12/2019
15/12/2019
16/12/2019
17/12/2019
18/12/2019
19/12/2019
20/12/2019
21/12/2019
22/12/2019
23/12/2019
24/12/2019
25/12/2019
26/12/2019
27/12/2019
28/12/2019
29/12/2019
30/12/2019
31/12/2019
23/12/2019
24/12/2019