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Temporal Database

Temporal Database. Chap 5: HSQL: A Historical Query Language. 5.2.4 Historical Relations and Their Representation.

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Temporal Database

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  1. Temporal Database Chap 5: HSQL: A Historical Query Language

  2. 5.2.4 Historical Relations and Their Representation If DATE is the granularity for the SHIPMENT object , two shipments received on same day (but at different times of the day) will be treated as though they occurred simultaneously (i.e.,at same time) . To clearly understand the basic functions of HDBMS , consider the following HSQL definition of a historical relation EMP :

  3. 5.2.4 Historical Relations and Their Representation

  4. 5.3 The Time Domain in HSQL

  5. 5.3.2 Interval Comparisons

  6. 5.3.3 Interval Operations

  7. 5.3.3 Interval Operations

  8. 5.3.4 Built-in Functions

  9. 5.3.4 Built-in Functions

  10. 5.3.5 Comparing Instants of Different Granularities

  11. 5.4 Historical Relational Algebra

  12. 5.4.3 New Primitive Operations

  13. 5.4.3 New Primitive Operations

  14. 5.4.3 New Primitive Operations

  15. 5.4.4 New Useful Operators

  16. 5.5.1 Data Definition

  17. 5.5.1 Data Definition

  18. 5.6 Data Retrieval

  19. 5.6 Data Retrieval

  20. 5.6 Data Retrieval

  21. 5.4.3 New Primitive Operations

  22. 5.6.1 Aggregate Functions

  23. 5.6.1 Aggregate Functions

  24. 5.6.1 Aggregate Functions

  25. 5.6.1 Aggregate Functions

  26. 5.6.1 Aggregate Functions

  27. 5.6.1 Aggregate Functions

  28. 5.6.1 Aggregate Functions

  29. 5.6.1 Aggregate Functions

  30. 5.7.1 The Insert Operation

  31. 5.7.2 The Update Operation

  32. 5.7.3 The Delete Operation

  33. 5.8.1 Delayed Maintenance

  34. 5.8.2 Error Correction

  35. 5.8.2 Error Correction

  36. 5.8.2 Error Correction

  37. 5.8.2 Error Correction

  38. 5.8.2 Error Correction

  39. 5.8.2 Error Correction

  40. 5.8.2 Error Correction

  41. 5.9 Using Nonhistorical Relations

  42. 5.10 Facilities for Time Rollback

  43. 5.11 Handle Future Time

  44. 5.11 Handle Future Time

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