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What are the different kinds of database end users? Discuss the major activities of each?
End-Users - End-users are the people whose jobs need access to the database for querying, updating, and generating reports; the database first and foremost exists for their use. The different types of end-users are:
Casual end-users - occasionally access the database, required different information each time
Naive or Parametric end-users - includes tellers, clerks, etc., make up a sizable portion of database end-users, major job function revolves around constantly querying and updating the database
Sophisticated end-users - involves engineers, scientists, business analyst, etc., use for their complex requirements
Stand-alone users - manage personal databases by using ready-made program packages, gives easy-to-use menu-based or graphics-based interfaces
What will be create when a primary key if combined with a foreign key? A primary key if combined with a foreign key it creates Parent-Child relationship between the tables that
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Explain the structure of well formed formulae in relational calculus. Ans: a. An atom is a formula b. If P1 is a formula, after that so are ¬P1 and (P1) c. If P1 and P2 a
why we fregment at all?
Consider the relations EMP(ENO,ENAME,AGE,BASIC_SALARY) WORK_IN(ENO,DNO) DEPT(DNO,DNAME,CITY) Express the following queries in SQL (i) Find names of employees who work in a dep
What is DML compiler? DML Compiler: Translates DML statements in a query language within low level instructions understandable through the query evaluation engine. Attempts to
Normalize the following table upto and including the 3NF. Submit a 1 page printout of only the final set of normalized tables in Data Architect. Just use Data Architect to do the t
why data in an RDMS need to be normalised
An instance of relational schema R (A, B, C) has distinct values of A including NULL values. then A is a candidate key or not? If relational schema R (A, B, C) has distinct val
please describe the data base management with the easy example &give the application?
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