Please briefly talk about the advantages and disadvantages of big data and give examples to illustrate what big data is.

The advantages of big data are obvious. It has a structure that everyone has. Each user's data in these dimensions will be recorded in the table. Taobao knows each user's double 1 1 spending power. Today's headlines know the news you are interested in like the back of your hand. The credit reporting company recorded your past credit history.

But the disadvantage of big data is that it is only a slice of the world and knows nothing about things outside the slice.