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Oracle SQL Model Clause version 10g - study guide and reference tutorial

Oracle Database 10g introduces an innovative approach to complex SQL calculations: the SQL Model clause.

An extension to SQL's Select statement, the Model clause enables developers to treat relational data as multidimensional arrays and define formulas on the arrays. It offers a concise, easy to read syntax and the functionality needed to handle demanding calculations. The Model clause resolves formula dependencies automatically, supporting large sets of interlinked formulas in sophisticated applications. In addition, Model clause processing employs advanced optimization techniques and data structures, for very high performance. The expressive power and ease of use of the Model clause, combined with the scalability and manageability of Oracle, provide a major advance for database applications.

Executive Overview... 3
Introduction. 3
Concepts.. 4
Technical details ........ 6
Basic Syntax........... 6
Sample Data........... 6
First Model Clause Example. 7
Referring to cells and values..... 8
Positional Cell Reference – Single cell access and upserts .............. 8
Symbolic Cell Reference: Multi-cell access and updates . 9
Positional and Symbolic Cell References in a single query............ 10
Multi-Cell References on the Right Side of a Formula .. 11
CV() Function: Use left-side values in right side calculations ..... 12
Using CV() in expressions for inter-row calculations† 13
Wild Card with "ANY" keyword....... 14
FOR Loops – a concise way to specify new cells† 14
FOR Loops which range over a value sequence ............. 15
Other cell-handling features.... 16
Order of evaluation of Formulas........ 16
NULL Measures and Missing Cells... 16
Reference Models .... 16
Iterative Models ....... 17
Conclusion† 17
Appendix: Model Clause Explain Plans .............. 18
Example Plan using ORDERED processing: ... 18
Example plan using ACYCLIC FAST processing† ......... 19

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Resource: http://www.oracle.com/technology/products/bi/pdf/10gr1_twp_bi_dw_sqlmodel.pdf
Posted By : Meenakshi
On date : 09.25.09

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