JQ: exclude specified embedded keys

Question

From the following input:

{
    "key1": {
        "key_x": "1",
        ...
        "key_z": "2"
    },
    "key2": {
        "key_x": "2",
        ...
        "key_z": "3"
    }
}

I would like to exclude all keys with the name "key_x" so the result should be

{
    "key1": {
        ...
        "key_z": "2"
    },
    "key2": {
        ...
        "key_z": "3"
    }
}

Answer 1

You can use the del() function:

jq 'del(.[]|.key_x)' input.json