Unverified50% confidenceDecision RuleExact time
An ideal deduplication key should satisfy three conditions: stable across data sources, one-to-one correspondence with business semantics, and unaffected by presentation-layer rewriting.
1
Sources
50%
Confidence
Long-term
Relevance
10/14/2026
First Seen
Sources
Related Entities
Related Claims
Unverified数据库规范化前三范式：第一范式要求每列值原子性，第二范式要求非主键列完全依赖于主键，第三范式要求非主键列之间不存在传递依赖70% similarUnverifiedThe idempotency key scheme inserts one record for each Idempotency-Key before the business processing logic runs, with a unique constraint built on three fields: org, key, and endpoint.66% similarUnverifiedUniqueness constraints should not remain only at the application-layer business logic level but should be pushed down to enforced constraints at the database layer.63% similarUnverified当数据是无序集合（调换行的位置不影响分类结果）时，应使用排列不变（permutation-invariant）架构61% similarUnverifiedMeasures to deal with duplicate chunks include exact deduplication via content hashing, near-duplicate clustering based on embedding similarity, establishing normalization policies, and weighting by source metadata at query time, none of which require changing the model.61% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/1025682API
curl https://kongchang.com/api/v1/knowledge/claims/1025682MCP
get_claim(id=1025682)