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MrRissso [65]
4 years ago
9

The relational database is the primary method for organizing and maintaining data today in information systems. It organizes dat

a in two-dimensional tables with rows and columns called relations. In a database, __________ is used to uniquely identify each record for retrieval or manipulation.
Computers and Technology
1 answer:
levacccp [35]4 years ago
5 0

Answer:

A key field is used to uniquely identify each record for retrieval or manipulation.

Explanation:

In a database there are many, having similar entities. So in order to differentiate each entity from other we need to set a key field among all the field which is always unique for each entity.

For example:

In a database of a company having data about its employees, the key field might be their ID. As some employees can have same names, addresses, phone numbers but cannot have the same ID.

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Why does a layer 3 device perform the anding process on a destination ip address and subnet mask?
mafiozo [28]
To get the network number and node number of the destination machine. The subnet mask is usually called the NETwork MASK, so anding it with the address gives you the network number. Using the not logical operator on the netmask then protects the node bits in a second and operation.

address & netmask = network number
address & not( netmask ) = node number

The not operator essentially just flips the bits of it's argument.
8 0
3 years ago
The parallax perspective says that objects that are close up appear to move __________ than far away objects.
serious [3.7K]

Answer:

It appears to move faster.

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3 years ago
Select the things you can do when working with rows in columns in a spreadsheet:
pantera1 [17]

Answer:

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5 0
3 years ago
If an object someThing has a method someMethod( ), then you can call the method using the statement ____________ .
Stels [109]

Answer:

C) someThing.someMethod( )

Explanation:

The methods in a class can be accessed outside the class (assuming they are public methods and not private to the class) by using the dot(.) symbol and calling the method on the instance or object of the class.

In this case, the object of the class someThing, calls the method, someMethod( ) by using a dot and the name of the method with a parentheses at the end. This enables the code in the method act on the class instance or object.

8 0
3 years ago
What are the data types in access​
Julli [10]

Answer:

Data type in Microsoft Access Database

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Long  

Single  

Double  

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Lookup Wizard

Explanation:

4 0
4 years ago
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