D 427: Data Management Applications Questions With Solutions
D 427: Data Management Applications Questions With Solutions Database models ️️- Data structures that prescribe how data is organized. - Operations that manipulate data structures. - Rules that govern valid data. relational model ️️- is a database model based on a tabular data structure - The relational data structure is based on set theory. -the result of relational operations is always a table, the result of an SQL query is also a table. big data ️️characterized by unprecedented data volumes and rapidly changing data structures. set ️️is an unordered collection of elements enclosed in braces. Ex: {a, b, c} and {c, b, a} are the same, since sets are not ordered.
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d 427 data management applications