ANY_VALUE() GROUP BY ...

All functions > GROUP BY > ANY_VALUE() GROUP BY ...

Returns an arbitrary value from the group.

Syntax

Diagram(
  Sequence(
    Terminal("ANY_VALUE"),
    Terminal("("),
    NonTerminal("expr"),
    Terminal(")"),
    Choice(0, Skip(),
      Sequence(
        Terminal("FILTER"),
        Terminal("("),
        Terminal("WHERE"),
        NonTerminal("condition"),
        Terminal(")")
      )
    ),
    Choice(0, Skip(),
      Sequence(
        Terminal("GROUP BY"),
        OneOrMore(NonTerminal("feature"), Terminal(","))
      )
    )
  )
)

Notes

• Result is non-deterministic: may return different values across runs
• Useful when you need any value from a group and don't care which one
• More efficient than MIN() or MAX() when exact value doesn't matter
• Returns NULL if all values in the group are NULL
• Can be used with WHERE clause to filter before aggregation
• Can be used with GROUP BY clause for grouped aggregation

Examples

SELECT
    f1 := ZIP(ARRAY[1, 1, 1] AS value).TRANSFORM(SELECT ANY_VALUE(value)).UNWRAP_ONE()  -- Any value from the group
;