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pantera1 [17]
3 years ago
5

explain the key reasons why entity relationship modeling is important, and determine at least (1) way in which it impacts the ov

erall development of the database.
Computers and Technology
1 answer:
Dimas [21]3 years ago
7 0

1st step in the data base design is data modeling. Data modeling involves conceptual data modeling and physical data modeling. E-R modeling is widely using to tool for conceptual data modeling.

A data model describes the structure of a database. Structure of data means describing the entities involved in the data base and their attributes, relationships among the entities, keys on entities , constraints etc… That is, the E-R model gives the clear picture about the database.

E-R modeling is a communication tool. It helps the data base designer to develop a good data base that meets the end users and application programmers. Especially, E-R modeling gives a pictorial representation of the database. Thus, the database designer can understand the data base description easily.

Therefore, unless the data base is modeled well, database cannot be developed well.

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Please help me !!
gavmur [86]

e. uhmmm

19+21=30

like....

easy.

What grade class is this? I wanna do it cause it easy AFef

6 0
3 years ago
Explain the history of America ​
Tomtit [17]

Explanation:

The history of the United States is what happened in the past in the United States, a country in North America. ... They won the Revolutionary War and started a new country. They signed the constitution in 1787 and the Bill of Rights in 1791.

Military conflict

8 0
3 years ago
Read 2 more answers
ACTIVITY NO. 5 (DAY 5) FACT OR BLUFF. Write Fact if the statement is correct and write Bluff if it is incorrect.
KengaRu [80]

All of the above are Facts.

preventive maintenance does indeed help with the lifespan etc.

If you are feeling tired or fatigued when operating machinery, stop and rest for fear of mistake. So , two is also correct

4if you dress inappropriately it may cause danger from getting caught in machinery or catching a flame depending on the worksite. so four is correct. Newer models are most likely more updated and have different operations then the last machine. so yes read the manual before using it. so yet again 5 is also correct.

hopefully this helped

3 0
3 years ago
Which of the following would allow for the QUICKEST restoration of a server into a warm recovery site in a case in which server
adelina 88 [10]

Answer: C. Differential backup

Explanation: There are several ways od ensuring the preservation and storage of data even cases of disaster, one of such ways is data data mirroring which allows data to be replicated or copied in real time and several backup options. In cases where there there is need to restore a server, the warm recovery site provides a data or disaster recovery option used to mitigate the effect of data loss on organization. In the absence of data mirroring, differential backup option, provides the quickest recovery option as it only requires changes in the data stored after the last full backup. These speed experieced should be expected due to the relatively low data been dealt with rather than the entire data.

5 0
3 years ago
Which of the following Internet connectivity technologies enables data to be sent over existing copper telephone lines by sendin
Pani-rosa [81]

Answer:

The answer is B. Digital subscriber line technology

Explanation:

Digital subscriber line or DSL technology is used to transmit digital data over telephone wires.

It makes file sharing possible which includes multimedia data (i.e. transfer of pictures and graphics), and also video and audio conferencing.

DSL uses a reliable medium that prevents packet loss and interruptions. It is also fast.

6 0
4 years ago
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