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Open Graph Description: 「Java学习+面试指南」一份涵盖大部分 Java 程序员所需要掌握的核心知识。准备 Java 面试，首选 JavaGuide！ - Coder994/JavaGuide

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https://github.com/Coder994/JavaGuide/blob/main/docs/database/sql/sql-questions-01.md#返回所有价格在-3-美元到-6-美元之间的产品的名称和价格
https://github.com/Coder994/JavaGuide/blob/main/docs/database/sql/sql-questions-01.md#检查-sql-语句-1
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https://github.com/Coder994/JavaGuide/blob/main/docs/database/sql/sql-questions-01.md#检索产品名称和描述二
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https://github.com/Coder994/JavaGuide/blob/main/docs/database/sql/sql-questions-01.md#检索产品名称和描述四
https://github.com/Coder994/JavaGuide/blob/main/docs/database/sql/sql-questions-01.md#创建计算字段
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https://github.com/Coder994/JavaGuide/blob/main/docs/database/sql/sql-questions-01.md#打折
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https://github.com/Coder994/JavaGuide/blob/main/docs/database/sql/sql-questions-01.md#返回每个订单号各有多少行数
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