1. OData Extensions for Data Aggregation Ralf Handl, SAP Hubert Heijkers, IBM Gerald Krause, SAP Mike Pizzo, Microsoft Martin Zurmühl, SAP 20 August 2013

2. Where do we want to go Dimensions (4) Country Customer Category Product Country (2) Netherlands USA Category (2) Food Non-Food Measures (2) Amount (SUM) Amount (MAX) CountryCategoryAmount (SUM) NetherlandsFood2 Non-Food3 USAFood14 Non-Food5

3. Simple Composable Query Language $apply= transformation / transformation / … Transformations Subset topcount(…), topsum(…), …, bottompercent(…), filter(…), identity Reshape aggregate(…), expand(…) Fork & Merge groupby(…, sequence), concat(sequence, sequence, …) Custom Functions sequence

4. GET ~/Sales IDCategoryProductCountryCustomerAmount 1Non-FoodPaperUSAJoe1 2FoodSugarUSAJoe2 3FoodCoffeeUSAJoe4 4FoodCoffeeUSASue8 5Non-FoodPaperUSASue4 6FoodSugarNetherlandsSue2 7Non-FoodPaperNetherlandsSue1 8Non-FoodPaperNetherlandsSue2

5. GET ~/Sales?$apply=aggregate(Amount) Amount 24

6. GET ~/Sales?$apply=groupby((Product),aggregate(Amount)) ProductAmount Paper8 Sugar4 Coffee12

7. GET ~/Sales?$apply=groupby((Product),aggregate()) Product Paper Sugar Coffee

8. GET ~/Sales?$apply=groupby((Product)) Product Paper Sugar Coffee

9. GET ~/Sales?$apply=groupby((Product),aggregate(Amount)) &$orderby=Amount desc ProductAmount Coffee12 Paper8 Sugar4

10. GET ~/Sales?$apply=groupby((Product),aggregate(Amount)) &$filter=Amount ge 8 ProductAmount Coffee12 Paper8 ProductAmount Paper1 Sugar2 Coffee4 8 Paper4 Sugar2 Paper1 2

11. GET ~/Sales?$apply=filter(Amount ge 8) /groupby((Product),aggregate(Amount)) ProductAmount Coffee8 ProductAmount Paper1 Sugar2 Coffee4 8 Paper4 Sugar2 Paper1 2

12. GET ~/Sales?$apply=groupby((Product),aggregate(Amount, Amount with max as MaxAmount)) ProductAmountMaxAmount Coffee128 Paper84 Sugar42

13. GET ~/Sales?$apply=groupby((Product), aggregate($count as SalesCount)) ProductSalesCount Coffee2 Paper4 Sugar2

14. GET ~/Sales?$apply=groupby((rollup(Country,Customer), rollup(Category,Product)), aggregate(Amount)) Food Non- Food SugarCoffee Paper USA 1421255 Joe 62411 Sue 8 844 Nether- lands 22 33 Sue 22 33 CountryCustomerCategoryProductAmount USAJoeNon-FoodPaper1 USAJoeFoodSugar2 USAJoeFoodCoffee4 USASueFoodCoffee8 USASueNon-FoodPaper4 NetherlandsSueFoodSugar2 NetherlandsSueNon-FoodPaper3 USANULLFoodSugar2 USANULLFoodCoffee12 USANULLNon-FoodPaper5 NetherlandsNULLFoodSugar2 NetherlandsNULLNon-FoodPaper1 USAJoeFoodNULL6 USAJoeNon-FoodNULL1 USASueFoodNULL8 USASueNon-FoodNULL4 NetherlandsSueFoodNULL2 NetherlandsSueNon-FoodNULL3 USANULLFoodNULL14 USANULLNon-FoodNULL5 NetherlandsNULLFoodNULL2 NetherlandsNULLNon-FoodNULL3

15. ProductCountryAmount PaperUSA5 SugarUSA2 CoffeeUSA12 SugarNetherlands2 PaperNetherlands3 ProductCountryAmount CoffeeUSA12 PaperNetherlands3 GET ~/Sales?$apply=groupby((Product,Country),aggregate(Amount)) /groupby((Country),topcount(1,Amount))

16. ProductCountryAmount PaperUSA5 SugarUSA2 CoffeeUSA12 SugarNetherlands2 PaperNetherlands3 ProductCountryAmount CoffeeUSA12 USA7 PaperNetherlands3 2 GET ~/Sales?$apply=groupby((Product,Country),aggregate(Amount)) /groupby((Country),M.TopCountAndBalance(N=1,A='Amount'))