Databases & Storage
Data Models: Relational vs Document vs Graph
Relational databases organize data into tables with rigid structure, document databases let you nest everything together like JSON blobs, and graph databases make relationships first-class citizens.
ACID propertiesNormalizationDenormalizationSchema-lessEventual consistencyJOIN operationsGraph traversalNodesEdgesForeign keys
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Data Models: Relational vs Document vs Graph - System Design Diagram
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