last

last(T.A : ‘a) sort T.B : ‘b 🡒 ‘a, aggregator

The aggregator requires a sort option to be specified and returns the last value for each group.

Example:

table T = with
  [| as A, as B |]
  [| "hello", "a" |]
  [| "hello", "a" |]
  [| "hello", "b" |]
  [| "world", "b" |]
  [| "world", "c" |]

table G[gdim] = by T.B

where T.B != "c"
  show table "" a1b4 with
    gdim
    last(T.A) sort T.A
    group by gdim

The sort option can be applied to any ordered data type. When the group is empty, the default value for the data type is used.

See also

• first.
• whichever.