Design the crow's feet model ER segment for each statements given below. A movie is directed by at least one director. A director may not direct a movie, but if he does, he could direct multiple movies. Each employee except for the Chairman (highest position) is supervised by exactly one employee. An employee who are considered supervisors supervises one or more employees. A project may or may not be accepted in an international conference, but can only be accepted in one. An international conference must accept one or more projects. A hospital has a database system for patients’ medical records. A patient is placed to only one ward if she is an inpatient and not an outpatient. A ward may have zero or more patients.
Operations
In mathematics and computer science, an operation is an event that is carried out to satisfy a given task. Basic operations of a computer system are input, processing, output, storage, and control.
Basic Operators
An operator is a symbol that indicates an operation to be performed. We are familiar with operators in mathematics; operators used in computer programming are—in many ways—similar to mathematical operators.
Division Operator
We all learnt about division—and the division operator—in school. You probably know of both these symbols as representing division:
Modulus Operator
Modulus can be represented either as (mod or modulo) in computing operation. Modulus comes under arithmetic operations. Any number or variable which produces absolute value is modulus functionality. Magnitude of any function is totally changed by modulo operator as it changes even negative value to positive.
Operators
In the realm of programming, operators refer to the symbols that perform some function. They are tasked with instructing the compiler on the type of action that needs to be performed on the values passed as operands. Operators can be used in mathematical formulas and equations. In programming languages like Python, C, and Java, a variety of operators are defined.
Design the crow's feet model ER segment for each statements given below.
- A movie is directed by at least one director. A director may not direct a movie, but if he does, he could direct multiple movies.
- Each employee except for the Chairman (highest position) is supervised by exactly one employee. An employee who are considered supervisors supervises one or more employees.
- A project may or may not be accepted in an international conference, but can only be accepted in one. An international conference must accept one or more projects.
- A hospital has a
database system for patients’ medical records. A patient is placed to only one ward if she is an inpatient and not an outpatient. A ward may have zero or more patients.
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