Question

One school of thought that developers have about primary keys is to add an additional column to uniquely identify each record. which is another school of thought?

primary keys should not be used at all.
a primary composite key should be used.
find unique values already in the data.
a default identifier should be created.

Answer 1

The another school of thought is:a primary composite key should be used.

Primary composite key

A composite primary key can be defined as those key that are made up of   several columns.

A composite primary key column value cannot be NULL  or have no value and in a situation were the column value are all  stacked up  or heaped together the values must be unique or peculiar.

Therefore the correct option is B.

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