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Write short notes on transaction state?
A transaction may not always complete its implementation successfully such a transaction is termed aborted
A transaction must be in one of the following states
Active
Partially committed
Failed
Aborted
Committed
Assignment #1 Data Management The questions on this exam are based on the Baxter Aviation case scenario. 1. (5 points) The systems analyst proposes the following two relationshi
What is the way a particular application views the data from the database that the application uses? Sub schema is the way a particular application views the data from the data
What is average response time? The average response time is that the average time for a transaction to be done after it has been submitted.
Explain the Recoverable Schedule A recoverable schedule is one in which for each pair of transactions Ti and Tj such that Tj reads a data item formerly written by Ti, the comm
What is conceptual model ? A conceptual model is a independent of both hardware and software.
What is the most significant feature that does not directly map into programming language structures? Why? Association, since there are complex types of association, like as qu
describe all the tables you have created. ?get table_name, status, num_rows, user_stats in user_tables system view ?get table_name, constraint_name, constraint_type in user_constr
Advantages of Observation Methods: Bailey has pointed out four advantages of observation: 1. Superior in Data Collection on Non Verbal Behavior: When a person a opi
When It is better to use files than a DBMS? It is better to use files than a DBMS when Multiple users wish to access the data.
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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