📅  最后修改于: 2022-03-11 14:55:00.187000             🧑  作者: Mango
db.example.update({}, [
{$set: {field: {
$concatArrays: [
{$slice: ["$field", P]},
{$slice: ["$field", {$add: [1, P]}, {$size: "$field"}]}
]
}}}
]);