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data_concept:foreign_key

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data_concept:foreign_key [2023/02/19 19:31]
peter
data_concept:foreign_key [2023/09/11 09:37]
peter
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 ===Definition=== ===Definition===
-Foreign key is a [[data_concept:data element|data element]] of a [[data_concept:data file |data file]]that corresponds to a [[data_concept:primary key|primary key]] of another [[data_concept:data file|data file]]. +foreign key is a [[data_concept:data element|data element]] of a [[data_concept:data file |data file]] that corresponds to a [[data_concept:primary key|primary key]] of another [[data_concept:data file|data file]]. 
- + 
 +===Relations=== 
 +|Foreign key|is child of |[[data_concept:data element|data element]]| 
 +|Foreign key|corresponds with|[[data_concept:primary key|primary key]]|of another [[data_concept:data file|data file]]|
data_concept/foreign_key.txt · Last modified: 2024/03/08 13:33 (external edit)