I have am learning relational algebra. I have a table,
Staff(name,salary,position)
Now a question states,
List all the managers with salary >25,000
Now the correct answer is,
selection position = manager ^ salary >25000(staff)
But I was thinking that it was,
projection position = manager ^ salary >25000(staff)
As we are selecting a particular attribute in the table and not selecting all the attributes. Please guide. Thanks