Sql Patterns

SQL Design Patterns Advanced SQL programming idioms

Genesis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is a SQL Pattern? ,[object Object],[object Object],[object Object],[object Object],[object Object]

List of Patterns ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Symmetric Difference ,[object Object],[object Object]

Venn diagram A B A ∩ B (A B) ∪ (B A) (A ∪ B) (A ∩ B)

SQL Query ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Test ,[object Object],[object Object]

Anti Join Transformation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Optimization continued… ,[object Object],[object Object],[object Object],[object Object]

Symmetric Difference via Aggregation ,[object Object]

Equality checking via Aggregation ,[object Object],[object Object],|| orahash 512259 + + + = 1523431 || orahash 267629 || orahash 334382 || orahash 592731

Relational Division x = JobApplicants JobRequirements ApplicantSkills Name Steve Pete Kate Language SQL Java Name Language Steve SQL Pete Java Kate SQL Steve Java Pete SQL Kate Java

Dividend, Divisor and Quotient Remainder Name Language Steve SQL Pete Java Kate SQL Kate Java / ApplicantSkills Language SQL Java = JobRequirements ? Name Kate

Is it a common Pattern? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Set Union Query ,[object Object],[object Object],[object Object],[object Object],[object Object],Sets ID ELEMENT 1 1 1 3 1 5 2 3 2 4 2 5 3 5 3 6

Set Intersection ,[object Object],[object Object],[object Object],Sets ID ELEMENT 1 1 1 3 1 5 2 3 2 4 2 5 3 5 3 6

It’s Relational Division Query! ,[object Object],[object Object],[object Object],/ = ID ELEMENT 1 1 1 3 1 5 2 3 2 4 2 5 3 5 3 6 ID 1 2 3 ELEMENT 5

Implementation (1) ,[object Object], Name Language Steve SQL Pete Java Kate SQL Steve Java Pete SQL Kate Java

Implementation (2) ,[object Object],π Name ( π Name ( ApplicantSkills ) x JobRequirements - ApplicantSkills )

Implementation (3) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Implementation in SQL (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Implementation in SQL (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Implementation in SQL (3) ,[object Object],[object Object],[object Object]

Implementation in SQL (4) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Implementation in SQL (5) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Implementation in SQL (6) ,[object Object],[object Object],[object Object],[object Object]

Sql Patterns

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Sql Patterns

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