Schema
a concept or framework that organizes and interprets information
In computer science and database management, a schema refers to the overall structure or blueprint of a database. It defines how data is organized and stored in tables within the database. The schema typically includes tables, columns, relationships between the tables and any constraints or rules that are applied to the data.
There are two primary types of schemas – physical schemas and logical schemas. A physical schema defines the actual layout of the database on disk, including the location of data files and indexes. A logical schema, on the other hand, defines the logical relationships between data elements, such as primary keys, foreign keys, and the relationships between tables.
Schemas are important because they provide a clear and consistent structure for organizing data within a database. This structure ensures that data is easy to find and retrieve when needed, and also helps to maintain consistency and accuracy of data over time. Schemas are also helpful when designing applications or building data analytics tools, as they provide a clear understanding of how data is stored and organized within the database.
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