A transaction for which all committed changes are permanent is called:
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Database is a collection of concepts that can be used to describe the structure of a database
Database provides necessary means to achieve this abstraction. By structure of a database we mean the data types, relations, and constraints that should hold on the data.
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We Can still delete a row from primary table if there are related rows in secondary table once a refferential integrity is enforced
Can’t delete a row from primary table if there are related rows in secondary table.
Physical data models describe the details of how data is stored in the computers
They describe the details of how data is stored in the computers
In enterprise data modeling, which is incorrect?
The no of entities participating in a relation is called
The no of entities participating in relation is called Degree of relationship
Which among the following is the disadvantage of circular list?
Both 2 and 3 are clearly the diadvantages of circular list
Which among the following is the relationship constraints
Both of them are relation ship constraints
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