What is the purpose of constraints when creating a new table?
Master SQL for Data Analysis - Creating Tables - Constraints
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Information Technology (IT), Architecture
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University
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Hard
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The video tutorial explains various SQL constraints used to maintain data integrity in tables. It covers NULL value constraints, check constraints for data validation, unique constraints to ensure data uniqueness, primary keys as unique identifiers, and foreign keys for referential integrity between tables. Examples using Netflix data illustrate these concepts.
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7 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
Explain the significance of a NOT NULL constraint in a database table.
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3.
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3 mins • 1 pt
What is a CHECK constraint and how is it used?
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4.
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3 mins • 1 pt
Describe the UNIQUE constraint and its importance in a database.
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5.
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3 mins • 1 pt
What is the role of a primary key in a relational database?
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6.
OPEN ENDED QUESTION
3 mins • 1 pt
How does a foreign key constraint maintain referential integrity?
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7.
OPEN ENDED QUESTION
3 mins • 1 pt
What are the steps to create a new table with constraints in SQL?
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