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有没有办法在 QLDB 表中添加外部约束?
假设我有两个打开的表,一个有一个没有,一个主键。我可以添加引用具有主键的外键约束吗?
索引也一样吗?如果我没有任何主键,而只有表上的索引,我可以添加引用这些索引的外键吗?