$all
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What is $all?
The $all operator in MongoDB selects documents where an array field contains all specified elements, regardless of order or additional elements. It's useful for tag-based filtering and ensuring multiple required values exist in arrays. $all performs element-wise matching and can work with arrays of different data types, making it essential for multi-criteria array filtering.
Free resources to learn $all
- Official docs$all
- Article$all and $elemMatch in MongoDB
More in stage 5: Creating Indexes
$all: common questions
Can I learn $all in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain $all in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this $all tutorial for beginners?
It is lesson 48 of 106 in the free MongoDB roadmap, in stage 5, Creating Indexes. If you are new to MongoDB, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.