Safe Haskell	None
Language	Haskell2010

Opaleye.SQLite.Distinct

Synopsis

distinct :: Default Distinctspec columns columns => Query columns -> Query columns
distinctExplicit :: Distinctspec columns columns' -> Query columns -> Query columns'

Documentation

distinct :: Default Distinctspec columns columns => Query columns -> Query columns Source #

Remove duplicate items from the query result.

Example type specialization:

distinct :: Query (Column a, Column b) -> Query (Column a, Column b)

Assuming the makeAdaptorAndInstance splice has been run for the product type Foo:

distinct :: Query (Foo (Column a) (Column b) (Column c)) -> Query (Foo (Column a) (Column b) (Column c))

distinctExplicit :: Distinctspec columns columns' -> Query columns -> Query columns' Source #