data integration
US /ˈdeɪtə ˌɪntəˈɡreɪʃən/
UK /ˈdeɪtə ˌɪntəˈɡreɪʃən/

1.
the process of combining data from different sources into a unified view
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Effective data integration is crucial for business intelligence.
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Our new system improves data integration across all departments.