Distinguish between Census Method and : Sampling Method. OR Compare Census and Sampling Method

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Census Method—Census investigaion or complete { count, in which information is collected about every unit of the universe relating to the problem under investigation. Population census or census of production is such investigation.
Sampling Method—Our knowledge, our attitudes, and our actions are based on a large extent on samples. Statistical^ techniques have improved so greatly that it is now not necessary to investigate all the items in any group from which we may wish to collect information. Indeed, we can carry out a survey of a population by merely investigating a fraction, i.e., a sample of that population.