What are some examples of normalization in SQL?
An example of an AI chatbot conversation about SQL normalization techniques and examples.
What are some examples of normalization in SQL?
Normalization in SQL is the process of organizing data to reduce redundancy. Common forms include 1NF, 2NF, and 3NF.
Can you explain what 1NF is with an example?
Sure! First Normal Form (1NF) requires that all columns contain atomic values. For example, a table of students should not have a column for 'Subjects' that lists multiple subjects in one cell.
What about 2NF? How does it differ from 1NF?
Second Normal Form (2NF) builds on 1NF by ensuring that all non-key attributes are fully functionally dependent on the primary key. This means no partial dependency.
Can you give me a practical example of 3NF?
Absolutely! In 3NF, a table is in 2NF and has no transitive dependencies. For instance, if you have a table with 'StudentID', 'CourseID', and 'InstructorName', 'InstructorName' should not depend on 'CourseID' alone.
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