relational data model

(database)(Or "relational model") A data model introducedby E.F. Codd in 1970, particularly well suited for businessdata management. In this model, data are organised intables. The set of names of the columns is called the"schema" of the table.

Here is an example table with the schema (account number,amount) and 3 lines.

account number amount-------------- ---------12343243546456 +30000.0023149875245824 +2345.3318479827492874 -123.25

The data can be manipulated using a relational algebra.SQL is a standard language for talking to a database builton the relational model (a "relational database").

["A relational model for large shared data banks"Communications of ACM 13:6, pp 377-387].

单词	relational data model
释义	relational data model relational data model (database)(Or "relational model") A data model introducedby E.F. Codd in 1970, particularly well suited for businessdata management. In this model, data are organised intables. The set of names of the columns is called the"schema" of the table. Here is an example table with the schema (account number,amount) and 3 lines. account number amount-------------- ---------12343243546456 +30000.0023149875245824 +2345.3318479827492874 -123.25 The data can be manipulated using a relational algebra.SQL is a standard language for talking to a database builton the relational model (a "relational database"). ["A relational model for large shared data banks"Communications of ACM 13:6, pp 377-387]. AcronymsSeeRDM
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