How to design database for sales tables in sql ??

Question

Hi,I have a employee table having following data:-

E_ID    E_Name  E_Zone  Username  Password

How do I design the tbltarget where I can keep track of targets for every employee on monthly basis. e.g. we can keep track of E_ID 501 has got how many target in sept month of 2017 and how many he achieved. I have designed the table like this way(below)

tbl_target :-

TID EID Target  month   Achieved
1   504 25     May        17
2   501 28     Jan        15
3   502 29     June       15
4   503 30     April      16
5   503 25     June       17
6   501 29     April      22
7   502 29     June       19
8   504 30     March      20
9   505 25     July       19
10  501 29     May        24

So, there is repetition of rows(E_ID).  Is there any effective method that you guys know that will work out here?? Pls let me know.