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Please tell me how to operate the related table query?

The teacher taught single table query or simple query in class, but related query was not mentioned. How should I do it?

东东东东1370 days ago1033

reply all(2)I'll reply

  • 猪老湿

    猪老湿2021-04-30 10:42:33

    Multi-table query has two modes: connection-based and view-based, but no matter which mode it is, it needs to start with single-table query...

    For more sql tutorials, you can check the sql manual, Thanks for asking

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    • 东东

    Thanks for the reply, teacher, but you may have misunderstood. It’s not that I can’t write SQL related queries, but I don’t know how to use PHP statements to write related queries.

    — 东东 · 2021-06-23 10:00:50
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