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What is NULL? Give an example to described testing for NULL in SQL?
The NULL SQL keyword is used to represent either a missing value or a value which is not applicable in a relational table. Consider there is a relation:
Person(id, name, address, phone)Now to search ids and names of person who do not have a phone is: Select id, name from Person where phone is null
CAN SOMEONE HELP ME WITH ENTITY DIAGRAMS IN FIRST NORMAL FORM?
Distributed Database Management System
Define the Traditional System Analysis and Design Traditional System Analysis and Design (SAD) have three basic life cycle models. A typical software lifecycle consists of the
job scheduling for different cubes
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
lock and types of lock
What are the parts of SQL language? The SQL language has various parts: data - definitition language Data manipulation language View definition Transaction contr
Explain the conventions (relationships) for displaying an ER schema as an ER diagram.
Define what Immediate database modification technique uses? Ans: Both undo and redo.
Explain the database Planning Project ?
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