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Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this info
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
Give an example of Object Representation For illustration, consider the implementation of a social security number within an employee object that is shown in Figure. The soci
What is self-transition? If there is a transition which goes back to same state, it is known as "self- transition." With a trigger action exit action would be executed f
How many types of users works on database? Users are differentiated through the way they expect to interact along with the system (i) Application programmers-interact with
Question: One of the tasks a database management system must perform is to ensure that the data is still intact in the face of software and hardware failure. This task is known
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
Attributes and its types explain?
Attributes that are directly kept in the data base. For example, 'Birth date' attribute of a person. Derived Attributes that are not stored directly but can be derived
Which two files are used during operation of the DBMS? Data dictionary and transaction log are two files used during operation of the DBMS.
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