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What is the result of applying the first normal form (1NF) to a table?
What is the result of applying the first normal form (1NF) to a table?
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Practice Questions
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Q1
What is the result of applying the first normal form (1NF) to a table?
All attributes are atomic
No transitive dependencies exist
All non-key attributes are dependent on the primary key
The table has no duplicate rows
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Applying the first normal form (1NF) ensures that all attributes in a table are atomic, meaning they cannot be divided further.
Questions & Step-by-step Solutions
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Q
Q: What is the result of applying the first normal form (1NF) to a table?
Solution:
Applying the first normal form (1NF) ensures that all attributes in a table are atomic, meaning they cannot be divided further.
Steps: 6
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Step 1: Understand what a table is. A table is a way to organize data in rows and columns.
Step 2: Identify the attributes (columns) in the table. Each attribute should hold a specific type of information.
Step 3: Check if any attribute contains multiple values. For example, if one cell has 'apple, banana', it is not atomic.
Step 4: If you find any attribute with multiple values, split those values into separate rows or create a new table.
Step 5: Ensure that each cell in the table contains only one value. This means every attribute should be atomic.
Step 6: Review the table to confirm that all attributes are now atomic and that the table is in 1NF.
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