表的主键和所有惟一索引都必须是相关分区键的超集。

The primary key and any unique index of the table must be a superset of the associated partitioning key.

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索引idx6还是与查询6中的谓词相匹配的惟一索引。

Index idx6 is also the only index that matches the predicate in query 6.

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然而，DB 2复制要求使用一个主键或惟一索引来区分一个表中的记录。

However, DB2 replication requires a key or index to uniquely identify rows in a table.

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