Database - Data Modeling with ER Model - Discussion
Discussion Forum : Data Modeling with ER Model - True or False (Q.No. 9)
9.
When designing a database, first identify the entities, then determine the attributes, and finally establish the relationships.
Discussion:
11 comments Page 1 of 2.
Basit said:
5 years ago
According to my opinion, answer must be true.
Girraj said:
9 years ago
I think the answer is true.
Ayush said:
9 years ago
For E-R Model this steps are applicable. Not for Database.
Rajan said:
9 years ago
I think the answer is true.
Devendra said:
1 decade ago
I think the answer my be true because without entity we cannot describe its associated attributes and relationship between them.
Atanu Das said:
1 decade ago
I think the answer is true as without identifying the entities and it's attributes one can not establish a relation.
Sandeep tripathi said:
1 decade ago
I think answer is true because without identifying the entities how can we find the attribute and if we don't know all entities then we can not identifies attributes and can not establish a relation.
Karam jeet kaur sohi said:
1 decade ago
I think the answer is true,
1. First we identify identies.
2. Then we may identify attributes (this part may be omited at this time).
3. And finaly we establish relationships in identities.
But in case of relational model we can't omit second step n mainly the relationships are defined between relations, based on these attributes.
1. First we identify identies.
2. Then we may identify attributes (this part may be omited at this time).
3. And finaly we establish relationships in identities.
But in case of relational model we can't omit second step n mainly the relationships are defined between relations, based on these attributes.
Shiv said:
1 decade ago
But why is the answer false?
Mayur said:
1 decade ago
Steps in designing a database
These are the basic steps in designing a database:
Determine the purpose of your database.
Determine the tables you need in the database.
Determine the fields you need in the tables.
Identify fields with unique values.
Determine the relationships between tables.
Refine your design.
Add data and create other database objects.
These are the basic steps in designing a database:
Determine the purpose of your database.
Determine the tables you need in the database.
Determine the fields you need in the tables.
Identify fields with unique values.
Determine the relationships between tables.
Refine your design.
Add data and create other database objects.
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