What is Cosine Similarity?
A mathematical metric measuring the cosine of the angle between two vectors, indicating how close their meanings are.
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More FAQs in What is a Vector Database and Why Do You Need One?
You can. Extensions like pgvector (PostgreSQL) exist, but dedicated vector databases are often more performant at scale.
The length of the vector array. For example, OpenAI's text-embedding-3-small generates vectors of size 1536.
If your document changes, you must regenerate its embedding and overwrite the old vector in the database.
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