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State The position of object at any moment is called state. An object can have many states depend upon time. After receiving some input instructions, the object can change its
Explain I command in QBE ? I : It is the command in QBE that is used to insert tuple (s) into the database
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 query processing ,query optimization and performance turring?
In how many parts events are classified Events are classified as four types in UML 1. Signals 2. Calls 3. Passing of Time 4. Change in State
Relationship between Security and Integrity: Database security usually refers to access, while database integrity refers to avoidance of accidental loss of consistency. But usually
There are three main sources of utilities and applications for a DBMS: a. Vendor applications and utilities are given for working with or maintaining the database, and generally
Fifth Normal Form (5NF) These relations still have a difficulty. While defining the 4NF we mentioned that all the attributes depend upon each other. Whereas creating the two ta
What is a trigger
give some example real life situation where DBMS are most suitable
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