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Write short notes on relational model
The relational model uses a collection of tables to show both data and the relationships between those data. The relational model is an example of a record based model.
client server architeutre
discuss the purpose of the concurrency control?
Defining Internal Classes and Operations When we enlarge algorithms, new classes can be added to the store intermediate results. A complex operation could be looked at, as a c
external and internal mapping with examples
I have to solve a problem using access
what do you mean by primary key constraint?
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
What is Cross Product? Simply Cross product is Binary Operator
Which data manipulation command combines the records from one or more tables ? JOIN data manipulation command combines the records from one or more tables.
Introduction In large projects, we can have many different companies working together. Generally, the project or contract is awarded to one company (Principal Contractor), which
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