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What are three components of the schema architecture proposed by ANSI/SPARC?
The three component schema architecture proposed by ANSI/SPARC is as given below:
External schema: An external view is abstract representation of some portion of total database.
Conceptual schema: A conceptual view is the logical representation of the database in its entity.
Internal schema: The internal schema is database as it is physically stored.
Oracle Fusion Middleware: Key Skills: Consulting,Architect, Oracle Fusion Middleware,ECM, UCM, Stellent,Identity Management, SOA Suites, BPEL, ESB,OAM,OIM,J2ee, Java, Livelink
Consider the join of a relation R with relation S. If R has m tuples and S has n tuples, then the maximum size of join is: If R has m tuples and S has n tuples then maximum siz
vertical fragmentation
What is database utility? Database utility is the interface among the ABAP/4 Dictionary and the underlying the SAP system.
What does authentication refer? Authentication refers to the task of verifying the uniqueness of a person.
Do NOT use the timestamp type. Use separate date and time data types only. Figure out how to define an SQL insert statement that uses built-in SQL (or MySQL) functions to define
what is completeness constrent?
complete assignment on the above title.
Explain how the object classes are mapped to tables. Each object class maps to one or more than one tables in the database. The objects in the class may be partitioned horizont
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