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You are using Snowflake Cortex to analyze customer reviews. You have created a vector embedding for each review using a UDF that calls a remote LLM inference endpoint. Now you need to perform a similarity search to identify reviews that are similar to a given query review. Which of the following SQL queries leveraging vector functions in Snowflake is the MOST efficient and appropriate way to achieve this, assuming the 'REVIEW EMBEDDINGS' table has columns 'review_id' and 'embedding' (a VECTOR column) and query_embedding' is a pre-computed vector embedding?
Correct Answer: E
The most efficient and accurate way to perform a similarity search with vector embeddings is using ordered in descending order because inner product is the fastest of the vector functions and still gets the vector similarity score. The operator performs an exact match which doesn't consider vector similarity (A). is for array data, not vectors (B). 'QUALIFY' and 'VECTOR COSINE SIMILARITY works but isn't optimal (C), and L2 distance require some value/threshold to compare. 'ORDER BY ... LIMIT is efficient with the inner product, it's very fast (E).