pingcap / pingcap/docs-cn

Description

File: /subquery-optimization.md

what's meaning with this word "semi join" .I can't find any thing about the word in that link.

Contributor guide

Open the contributing guide

First steps

1. Read the whole issue, then the project's contributing guide.
2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
3. Fork the repository and make your change on a branch.
4. Open a pull request that references the issue number.

Assessment

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