Compare latest 30 rows with previous 30 rows - *Urgent Help*

Transact-SQL
22

Also:

  1. can multiple rows be added with one INSERT statement or are rows always added one at a time?
  2. what is the PK of the table?
23

I think the person is using rows and samples interchangeably and its mad confusing?

24

One sample is added at a time, which means 3 rows are added at a time(since each sample has 3 features).

Sample names (S1, S2...) are the unique identifiers.

25

Please answer this
:point_up:t6: