PostgreSQL 练习
您可以使用 W3Schools 的练习来测试您的 PostgreSQL 技能。
练习
我们为每个 PostgreSQL 章节收集了各种 PostgreSQL 练习（带答案）。
尝试通过编辑一些代码来解决练习，或者查看答案以了解您做错了什么。
计算您的分数
每个正确答案您将获得 1 分。您的分数和总分将始终显示。
如果您不了解 PostgreSQL，我们建议您从头开始阅读我们的 PostgreSQL 教程。
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