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Hello List!
Project:M36 v1.0.1 adds support for aggregate functions which can be
applied to relations with more than one attribute. The new TutorialD
syntax supports referencing attributes of subrelations. For example:
TutorialD (master/main): :showexpr (s group ({all but city} as
g):{city_total:=sum(@g.status)}){city,city_total}
┌──────────┬───────────────────┐
│city::Text│city_total::Integer│
├──────────┼───────────────────┤
│"Athens" │30 │
│"London" │40 │
│"Paris" │40 │
└──────────┴───────────────────┘
looks very much like the result of a common SQL aggregation grouped by city.