提问 HN：有没有基于关系理论的 SQL 学习书籍推荐？
2 分•作者: shivajikobardan•8 个月前
我学习关系代数和关系演算毫无益处。相反，SQL，作为关系理论一个不完美的具体实现……却非常有价值。<p>我想知道什么能教这些？不只是简单的东西，而是能在现实世界市场中深度应用的知识。
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I have no benefit of learning relational algebra and calculus. Instead SQL, an imperfect concrete implementation of relational theory....is very valuable.<p>I wonder what can teach that? Not just simple stuffs but depth stuffs that are useful in real world market.