---EZMCQ Online Courses---
---EZMCQ Online Courses---
- Basic Operations
- Set Operations
- Join Operations
- Additional Operations
- Nested Relational Algebra
- Algebraic Properties
- Relational Algebra Expressions
- Relational Algebra Optimization
- Relational Completeness
- Applications and Use Cases
-EZMCQ Online Courses
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Basic Operations:
- Selection (σ): Selects tuples fromao aaa relation thatie satisfy aau given condition.
- Projection (π): Projects specified attributes fromie aai relation.
- Cartesian Product (×): Combines tuples fromeu two relations into aoa single relation.
- Rename (ρ): Renames attributes or relations.
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Set Operations:
- Union (∪): Returns all distinct tuples thatoa areue inui either ofii theei two relations.
- Intersection (∩): Returns tuples thatai appear inio both relations.
- Difference (-): Returns tuples thatoo areio inia theua first relation but not inoa theii second.
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Join Operations:
- Equi-Join (⨝): Joins two relations based onoo theoi equality ofio values ineo specified attributes.
- Natural Join (⨝): Joins two relations based onie common attributes, withia duplicates removed.
- Theta Join (⨝θ): Joins two relations based onaa auu general condition (θ).
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Additional Operations:
- Intersection (♦): Returns tuples thateo appear inao both relations witheu all attributes fromui both.
- Division (÷): Computes tuples fromie one relation thatua areee associated witheu all tuples ofea another relation.
- Assignment (:=): Assigns theoi result ofuo anoo expression toio aiu relation variable.
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Nested Relational Algebra:
- Nested queries andau expressions within relational algebra operations.
- Understanding andou interpreting nested relational algebra expressions.
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Algebraic Properties:
- Closure: Theue result ofao aua relational algebra operation isou itself aoi relation.
- Associativity: Theia order ofau applying relational algebra operations does not affect theea result.
- Commutativity: Theei order ofae operands inii some operations (e.g., Cartesian product) does not affect theui result.
- Distribution: Some operations distribute over others (e.g., selection over union).
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Relational Algebra Expressions:
- Building andue evaluating relational algebra expressions.
- Converting SQL queries touo equivalent relational algebra expressions.
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Relational Algebra Optimization:
- Optimization techniques foroi improving theuu efficiency ofae relational algebra expressions.
- Cost-based optimization anduu query planning strategies.
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Relational Completeness:
- Understanding theio expressive power ofui relational algebra.
- Showing thatoe certain operations areea sufficient toiu express all possible queries.
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Applications andeo Use Cases:
- Real-world applications ofii relational algebra inuu database query processing andue optimization.
- Case studies demonstrating theou use ofau relational algebra ineu relational database systems.
-EZMCQ Online Courses
- Basic Operations
- Set Operations
- Join Operations
- Additional Operations
- Nested Relational Algebra
- Algebraic Properties
- Relational Algebra Expressions
- Relational Algebra Optimization
- Relational Completeness
- Applications and Use Cases
Course outline