Table: parts_per_notation
Columns: coefficient
parts_per_example
uno_equiv
symbol_form
value_of_quantity

Question: What is the Parts-per example of 2×10 −6?
SQL: SELECT "parts_per_example" FROM parts_per_notation WHERE "value_of_quantity" = '2×10 −6'

Question: What is the Coefficient of 2 ppt?
SQL: SELECT "coefficient" FROM parts_per_notation WHERE "parts_per_example" = '2 ppt'