MongoDB 聚合 $limit
聚合 $limit
此聚合阶段限制传递到下一阶段的文档数量。
示例
在此示例中，我们使用从我们的示例数据（在聚合简介部分中加载）加载的“sample_mflix”数据库。
db.movies.aggregate([ { $limit: 1 } ])
这将返回集合中的第一个电影。
聚合
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