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how does Btree differ from a B+ - tree?
explain the steps for reduction of er model into relational model?
What's the difference between a primary key and a unique key? Both primary key and unique key enforces uniqueness of the column on which they are explained. But by default prim
how to prepare a data dictionary for online examination system for certified courses?
Draw entity relationship diagram for the following scenario. A university has many departments whereas each department belongs to that particular uni. That uni has also many bui
Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
courier company er-diagram
User error : This contains errors in the program (e.g., Logical errors) with errors made by online users of database. These types of errors can be avoided by applying some check
What is Information System?
Databases and data warehouses both are databases and both contains number of rows and columns of tables containing data. Data warehouse is really different from databases because d
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