How to count new entered Id and existing removed id based on month

[silambarasan]

Eg:

  one month :ID -1,2 are enter,so count is two

  two month: Id-3 are enter,so count is one

three month: Id-2 removed ,so count of removed id is 1

four month : id-1 removed and id-4 enter so 1 & 1 which means count of enter id and count of removed id

output table:

Date  count

1-jan  2

1-feb  3

1-mar  1

1-apr   1  & 1

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Message was edited by: Silambu