Count if sum of one column equal to sum of another column

[gal_polak]

Hi,

Two things that i still don't find clear enough

1. is it possible to use "IF" inside the set expression of  an aggregation (i.e. count,sum..etc.) 
for example: count( if(date>today(),date))

2. i would like to count the Users.KEY in case the sum of WasLoginPotential equals to the sum of WasLoggedIn

for example i have this table:

1	Users.KEY	FactMonthlyLogins.Month	WasLoginPotential	WasLoggedIn
1	4367|5638	Feb	1	1
1	4367|5638	Apr	1	1
1	4367|5638	Jun	1	1
1	4367|5638	Jan	1	-
1	4367|5638	Mar	1	-
1	4367|5638	May	1	-
1	4367|5638	Jul	1	-
1	4367|5638	Aug	1	-

what you would recommend to do? 

[Anil_Babu_Samineni]

1) Definitely you can use it
2) I wold prefer this way

Count({<Users.KEY = {"=Sum(WasLoginPotential)=Sum(WasLoggedIn)"}>} Users.KEY)