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A schema of a database system is its structure described in a formal language supported by the database management system (DBMS) and refers to the organization of data to create a blueprint of how a database will be constructed (divided into database tables).

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What is the difference between logical schema and physical schema?

I started working with databases in the 70's and tend to use data dictionary to mean the physical representation of data, and the schema to mean the logical model. … A schema is like a blueprint that helps you visualize the way the data is organized. …
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