How to append two CSV files using ftp

Hi
Please let me know the FTP command to append the two .CSV files into one .CSV file.
e.g.
Let me explain:
one CSV file has the fields F1 , F2, F3 , F4 and has 5 records
another CSV file has the same sequence of fields F1, F2, F3, F4 and has 10 records
after appending both the files , I must get 15 records.
Thanks
Alok

Ok I will try out.
I am illustrating my requirement as follow
File#1 (type .CSV)
F1     F2     F3     F4
100   566    89     86
235   256    56     12
File#2 (type .CSV)
F1     F2     F3     F4
56     56     98     102
12     23     36      523
23      56     56    89
Now we want to Append File#1 to File#2 as follow:
F1    F2    F3     F4
100   566    89     86
235   256    56     12
56     56     98     102
12     23     36      523
23      56     56    89
Please suggest now that which command would be appropiate.
Alok

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