Vector db qa

LangChain Hub prompt for Vector db qa

promptBeginner5 min to valuemarkdown

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Jan 12, 2026

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Vector db qa

Description of Vector DB Question Answering Prompt

Prompts to be used in vector DB question answering chains.

Inputs

This is a description of the inputs that the prompt expects.

context: Documents pulled from the DB to do question answering over.
question: Question to ask of the documents.

Usage

Below is a code snippet for how to use the prompt.

from langchain.prompts import load_prompt
from langchain.chains import VectorDBQA

llm = ...
vectorstore = ...
prompt = load_prompt('lc://prompts/vector_db_qa/&#x3C;file-name>')
chain = VectorDBQA.from_llm(llm, prompt=prompt, vectorstore=vectorstore)

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