Explain the value of utilizing the entity relationship model (E-R Model) and the entity relationship diagram (ERD) for relational databases. Is this an advantage or disadvantage? Why?
2006-09-13 10:37:15 · 2 answers · asked by salme1315 1 in Business & Finance ➔ Other - Business & Finance
Using Normalization is an abstract process that doesn't necessarily fit your specific data model perfectly. ER looks at the entities that you really have and allows you to create a data structure based on what entities really exist and any unusual relationships between them.
2006-09-13 10:41:34 · answer #1 · answered by teef_au 6 · 0⤊ 0⤋
If you and the people your are working with are familiar with ER diagrams, I think you find that they are useful, however, they do have limitations.
UML was created to overcome some of the limitations of ER and other data description tools.
2006-09-13 17:47:09 · answer #2 · answered by icprofit6000 7 · 0⤊ 0⤋