What are the two main schools of thought developers have about primary keys? Check all that apply. Add an additional field to uniquely identify each record.
Use all fields-as the unique primary key for a table.
Avoid the use of primary keys in tables.
Find values already in the data that uniquely identify records.

answer; certification; plz check first, i believe this is correct. good luck;

answer; availability;

amazon is a website were you shop cosmetics such as clothes, electronics and food. amazon also makes there own thechnology such as kindle book readers and tablets or the alexa which is an inteligent ai. and they also have a streaming service which is called prime video.