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what is Mapping Constraints? with examples
What is Nested Queries explain in details? Nested Queries - A SELECT query could have subquery(s) in it. While a SELECT query having another SELECT query in it, is known as n
Define garbage collection. Garbage may be formed also as a side effect of crashes. Periodically, it is essential to find all the garbage pages and to add them to the list of fr
4. Describe three ways to handle missing field values
Our company hires independent contractors to install equipment at precise locations across North America. We want to track the installation data and generate reports. The compan
Foreign Keys and NULL Let us take the relation: DEPT DEPT ID DNAME BUDGET D1 M
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
What is a Built-in A notation of identity is built-into the data model or programming language and no user-supplied identifier is needed. This form of identity is used in objec
Representing complex relationship among data A database may contain varieties of data interrelated to each other in numerous ways. A DBMS must have the capability to represent
how does Btree differ from a B+ - tree?
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