select from (something)
1. To make a choice or selection from a particular group of people or things. Every year we have to select from a wide pool of applicants, so we have to stick very strictly to the criteria of admission. Come to our shop and select from a wide range of delectable baked goods.
2. To choose or single out a particular person or thing from a group of others. It's hard to select a single dish from such a huge menu. We'll be selecting one person from the school to represent us at the national spelling bee.
select someone from something
to choose someone from a group of people. You will have to select a new secretary from the available pool of workers. I selected Ted from the applicants I had at the time.
select from someone or something
to make a choice from a group of people or things. You will have to select from the people we have asked to interview with you today. They told me that I had to select from what you have in stock.