Настройки формата output_format_*

SET output_format_json_array_of_rows = 1;
SELECT number FROM numbers(3) FORMAT JSONEachRow;

[
{"number":"0"},
{"number":"1"},
{"number":"2"}
]

SET output_format_json_array_of_rows = 0;
SELECT number FROM numbers(3) FORMAT JSONEachRow;

{"number":"0"}
{"number":"1"}
{"number":"2"}

"data":
[
  {
    "tuple": {"a":1,"b":2,"c":3},
    "array": [1,2,3],
    "map": {"a":1,"b":2,"c":3}
  }
],

"data":
[
    {
        "tuple": {
            "a": 1,
            "b": 2,
            "c": 3
        },
        "array": [
            1,
            2,
            3
        ],
        "map": {
            "a": 1,
            "b": 2,
            "c": 3
        }
    }
],

┌─id─┬─name───┬─duration─┬─period─┬─area─┐
│  1 │ Andrew │       20 │      0 │  400 │
│  2 │ John   │       40 │      0 │    0 │
│  3 │ Bob    │       15 │      0 │ -100 │
└────┴────────┴──────────┴────────┴──────┘

SELECT area/period FROM account_orders FORMAT JSON;

{
        "meta":
        [
                {
                        "name": "divide(area, period)",
                        "type": "Float64"
                }
        ],

        "data":
        [
                {
                        "divide(area, period)": null
                },
                {
                        "divide(area, period)": null
                },
                {
                        "divide(area, period)": null
                }
        ],

        "rows": 3,

        "statistics":
        {
                "elapsed": 0.003648093,
                "rows_read": 3,
                "bytes_read": 24
        }
}

{
        "meta":
        [
                {
                        "name": "divide(area, period)",
                        "type": "Float64"
                }
        ],

        "data":
        [
                {
                        "divide(area, period)": "inf"
                },
                {
                        "divide(area, period)": "-nan"
                },
                {
                        "divide(area, period)": "-inf"
                }
        ],

        "rows": 3,

        "statistics":
        {
                "elapsed": 0.000070241,
                "rows_read": 3,
                "bytes_read": 24
        }
}

! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^ _ ` { | } ~

SELECT *, toTypeName(*) FROM (SELECT * FROM system.numbers LIMIT 1000);

      ┌─number─┬─toTypeName(number)─┐
   1. │      0 │ UInt64             │
   2. │      1 │ UInt64             │
   3. │      2 │ UInt64             │
   ...
 999. │    998 │ UInt64             │
1000. │    999 │ UInt64             │
      └─number─┴─toTypeName(number)─┘