Fact table contains numerical values which can be measured. Hence these are also called as measures. Basically, these are nothing but your numbers like
Though, all these questions have a different answers, the answer will be a number or a numeric value. Which are either derived/calculated or will be used for derivation or calculation for various purposes.
There are different types of fact tables.
Additive Fact: Additive fact is the fact that can be summed up through all the dimensions in the fact table. Sales fact is the example for additive fact.
Semi Additive Fact: Semi additive fact is the fact that can be summed up some of the dimensions in the fact table.
Non Additive Fact: Non additive fact is the fact that can not be summed for any dimension in the fact table.
Fact less Fact table: It is a fact table which will have keys from various dimensions but will not have any facts/measures in it.
Cumulative Fact: It is a fact which will store the data over a period of time.
Snap shot: It is a fact which will store the data at a point of time.