QueryBuilder.LeftOuterJoin<'Outer,'Q,'Inner,'Key,'Result> Method (F#)
A query operator that correlates two sets of selected values based on matching keys and groups the results. If any group is empty, a group with a single default value is used instead. Normal usage is leftOuterJoin (for y in elements2 -> key1 = key2) into group.
Namespace/Module Path: Microsoft.FSharp.Linq
Assembly: FSharp.Core (in FSharp.Core.dll)
// Signature: member this.LeftOuterJoin : QuerySource<'Outer,'Q> * QuerySource<'Inner,'Q> * ('Outer -> 'Key) * ('Inner -> 'Key) * ('Outer -> seq<'Inner> -> 'Result) -> QuerySource<'Result,'Q> // Usage: queryBuilder.LeftOuterJoin (outerSource, innerSource, outerKeySelector, innerKeySelector, resultSelector)