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Explain Data Sublangauges ? Data sublanguage: In relational database theory, the term sublanguage, first used for this purpose through E. F. Codd in the year of 1970, refers t
Explain the conventions (relationships) for displaying an ER schema as an ER diagram.
Build a database application for a sports league. Assume your application is to keep track of teams and equipment that is checked out to teams. Explain the steps that is needed and
Write a query to define tables students and teachers as sub tables of people? Create table students of student under people Create table teachers of teacher under people
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
Physical Records These are the records that are stored in the secondary storage devices. For the database relation, physical records are the group of fields kept in adjacent me
List any two significant differences between a file processing system and a DBMS. File Processing System vs. DBMS Data Independence - Data independence is the capacity t
WHY SHOULD NULL IN A RELATION BE AVOID AS possible?
Write a query that display ename annual salary and comm from emp table
What are the disadvantages of relational data ? Disadvantages • Performance - If the number of tables among that relationships to be established are large and the tables t
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