What's different with census and sample?

A census is a study of every unit, everyone or everything, in a population. It is known as a complete enumeration, which means a complete count. A sample is a subset of units in a population, selected to represent all units in a population of interest.

I know when you do a census, you cover the entire population but when you take a sample, you select a group from the population. There can be only one census but there can be many different samples from the same population. Hence, the latter results in sampling error (because it is just one aspect of the population)

Hope this helps have a nice day