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Database Design & Management, Database Management System
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Posted Date: 3/6/2013 8:20:44 AM | Location : United Kingdom
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The concurrent transactions, The Concurrent Transactions Almost every ...
The Concurrent Transactions Almost every commercial DBMS support multi-user environment. Therefore, allowing multiple transactions to proceed concurrently. The DBMS must make
Foreign keys , Foreign Keys and NULL Let us take the relation: ...
Foreign Keys and NULL Let us take the relation: DEPT DEPT ID DNAME BUDGET D1 M
Access data using logical database, If one requires to access data using...
If one requires to access data using Logical Database , the use of events is unavoidable. Yes, if someone wants to access data using Logical database then the use of events
Can a domain, Can a domain, assigned to a data element be changed? Yes....
Can a domain, assigned to a data element be changed? Yes. We can do so by just overwriting the entry in the field domain.
What do you mean by atomicity and aggregation, What do you mean by atomicit...
What do you mean by atomicity and aggregation? Atomicity : Either all actions are carried out or none are. Users should not have to worry about the effect of incomplete trans
Define ssn of salesman by using database of business trips, Consider the su...
Consider the subsequent relations for a database which keeps track of business trips of salespersons in a sales office: SALESPERSON (SSN, Name, start_year, Dept_no) TRIP (SSN, Fr
Process-oriented decompositions, Process-oriented decompositions Pr...
Process-oriented decompositions Process-oriented decompositions divide complex process, task or function into simpler sub processes until they get simple enough to be deal
Maping constraits, #question.what is mapping constraints and types?.
#question.what is mapping constraints and types?.
Record based logical models, Record based Logical Models: Use records as th...
Record based Logical Models: Use records as the key data representation components Examples: Relational Model: It shows data as well as relationship between data in the form
A basic model of database access control, A basic model of Database Access ...
A basic model of Database Access Control Models of database access control have grown out of previous work on protection in operating systems. Let us talk about one simple mode
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