Define second normal form. What types of problems might you encounter using tables that are not in second normal form?
Define second normal form. What types of problems might you encounter using tables that are not in second normal form?
Chapter2: Database Design Fundamentals
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Problem 13RQ: Define second normal form. What types of problems might you encounter using tables that are not in...
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Define second normal form. What types of problems might you encounter using tables that are not in second normal form?
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Step 1
Database Normalization :
- In database normalization data is represented in terms of relations that are in the standard normal form and it is a design technique that reduces data redundancy as well as eliminates undesirable characteristics.
1NF (First Normal Form) :
- The first Normal form is considered as a basic requirement of the database.
Rules :
- Each table should contain a single value attributes or column.
- Each record in a table needs to be unique.
2NF(Second Normal Form) :
- A table is in second normal form if and only if it is in first normal form and it should not have a partial dependency.
Rules :
- A table in first normal form.
- it has a single-column primary key.
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