argAndMax

SELECT argAndMax(user, salary) FROM salary;

┌─argAndMax(user, salary)─┐
│ ('director',5000)       │
└─────────────────────────┘

CREATE TABLE test
(
    a Nullable(String),
    b Nullable(Int64)
)
ENGINE = Memory AS
SELECT *
FROM VALUES(('a', 1), ('b', 2), ('c', 2), (NULL, 3), (NULL, NULL), ('d', NULL));

SELECT argMax(a, b), argAndMax(a, b), max(b) FROM test;

┌─argMax(a, b)─┬─argAndMax(a, b)─┬─max(b)─┐
│ b            │ ('b',2)         │      3 │
└──────────────┴─────────────────┴────────┘

SELECT argAndMax(a, (b,a)) FROM test;

┌─argAndMax(a, (b, a))─┐
│ ('c',(2,'c'))        │
└──────────────────────┘