Unique Identifier

A unique identifier is a value or a set of values that can be assigned to a data entity to uniquely identify it within a given context. In data science, unique identifiers are used to ensure that each data point is distinct and can be easily referenced and tracked. Unique identifiers can be generated using various techniques such as hashing, encryption, or sequential numbering. They are commonly used in databases, data warehouses, and data lakes to ensure data integrity and consistency. Unique identifiers are also used in machine learning models to identify and track individual data points and to prevent overfitting. In addition, unique identifiers are used in data linkage and data integration to match data from different sources based on common identifiers.
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