DATA INDEPENDENCE IN DBMS
DATA INDEPENDENCE · Data independence is described by the three-tier schema architecture. · When we modify the schema at one level then other level schemas are not modify or change. · Helps to keep data separated from all programs which used it. · Stored data is used for calculating and presentation. Levels of Datab…
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The comparison among the record based data models in dbms
The comparison among the record based data models in DBMS HIERARCHICAL MODEL NETWORK MODEL RELATIONAL MODEL It organizes records in form of the tree structure. It organizes records in form of directed graphs. It organizes records in form of tables. Only one to one (1:1) and one t…
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Data Models in DBMS
Data Models · • Data models are frameworks or blueprints that describe how data is organized, stored, accessed, and managed in databases. • They provide a structure for representing data, relationships, and constraints, ensuring efficient management, reliability, and integrity of data. Common features Abstraction of complex real…
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