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课程 8
SQL: talking to the database
📖 课程
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🎯 测验——选择翻译
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✅ 本课已完成
All Kapnula listings live in a database — like an Excel sheet. SQL is the language of questions: SELECT * FROM listings WHERE city = "Berlin" — give me all Berlin listings.
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表—行与列
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SELECT—查询
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WHERE—条件
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INSERT—插入
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UPDATE—更新
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DELETE—删除
💡 SQL is almost 50 years old — and still the main data language. Learn once, works everywhere: MySQL, PostgreSQL, SQLite.