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| datu modelis (A collection of related object types, operators, and integrity rules that form the abstract entity supported by a database management system (DBMS). Thus, one speaks of a relational DBMS, a network DBMS, and so on, depending on the type of data model a DBMS supports. In general, a DBMS supports only one data model as a practical rather than a theoretical restriction) | |||
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| datamodel (ssn) | |||
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data model : 3 短语, 1 学科 |
| 微软 | 3 |