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The Incident table, with an auto-incrementing incident number, etc, looks like: incident_num reporter date time incide
What are domain constraints? A domain is a set of values that might be assigned to an attribute .all values that appear in a column of a relation must be taken from the similar
Design a database for an airline.The database must keep track of customers and their reservations,flights and their status, seat assignment on individual flights and, the schedule
There are many simple and complex approaches to implement. These reports are based on some views or certain query. The following number of reports can be built. 1. The averag
For each 1: n relationship type R involving two entities E1 and E2, we recognize the entity type (say E1) at the n-side of the relationship type R and contain primary key of the en
Write short note on Data models? Data models: A data model is an abstract model which elaborates how data is represented and accessed. The term data model has two commonly ac
what is correlation in nested query
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Components of database manager The above functions are reached by the database manager. The major elements of a database manager are: Authorisation control: This mod
how many hourse have been spent on a certain project
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