Retrieve only second week of the month data?

Hi, My friend asked me following requirement where i need to get only week wise data with out giving dates. Please help me to acheive this.

Date	Name	Units
1/8/2018	ABC	10
2/8/2018	ABC	11
3/8/2018	ABC	12
4/8/2018	ABC	13
5/8/2018	ABC	14
6/8/2018	ABC	15
7/8/2018	ABC	16
8/8/2018	ABC	17
9/8/2018	ABC	18
10/8/2018	ABC	19
11/8/2018	ABC	20
12/8/2018	ABC	21
.	ABC	22
.	ABC	23
.	ABC	24
31/8/2018	ABC	25

 

Here i have august month data, i need to get second week of the data in a month.