# Learn 102

- 102: Merging data

  - Query on items/dicts

    - With merge strategy

  - Query on arrays/lists

    - It appends, replace or what ?

  - Query other types

  - Query without key (!)

    - Not the actual result, schema are not sub applied

      - BUG: TO Fix ? Performance issue ?

- 103: Scoped queries

  - Add scoped variables

  - Add variables to trees

  - Use loops

  - Use hierarchies, for hostgroups

  - Use includes for other files (Future)