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Update foreign-key.md
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lilin90 committed Nov 19, 2024
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Expand Up @@ -5,7 +5,7 @@ summary: TiDB 数据库中外键约束的使用概况。

# 外键约束

从 v6.6.0 开始,TiDB 支持外键以及外键约束功能,外键允许跨表交叉引用相关数据,外键约束则可以保证相关数据的一致性
外键允许跨表交叉引用相关数据,外键约束则可以保证相关数据的一致性。从 v6.6.0 开始,TiDB 支持外键以及外键约束功能。从 v8.5.0 开始,该功能成为正式功能

> **警告:**
>
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