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Defining Source Metadata

Defining Source Metadata. Objectives. After completing this lesson, you should be able to do the following: Define and create flat file and Oracle modules Import and sample flat file sources Import relational database objects in an Oracle module View source data in Data panel. Lesson Agenda.

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Defining Source Metadata

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  1. Defining Source Metadata

  2. Objectives • After completing this lesson, you should be able to do the following: • Define and create flat file and Oracle modules • Import and sample flat file sources • Import relational database objects in an Oracle module • View source data in Data panel

  3. Lesson Agenda • Data warehouse implementation: Typical steps • Metadata to data • Relational and flat file source metadata: Difference • Data sources • Flat file sources • Create a flat file module • Import and sample a flat file • Oracle database sources • Create an Oracle module and import Oracle database objects • View the source tables data

  4. 1. Define the source metadata. 2. Define staging area metadata. 3. Define a relational dimensional model. 4. Create process flows. 5. Deploy the mappings. 6. Execute or run the mappings. 7. View the data. Data Warehouse Implementation: Typical Steps Part 1 Part 2

  5. Metadata to Data 1. Initialize and organize the modules. 2. Import the metadata. (This gives you only the data definition.) 3. Use the metadata to define the mapping. 4. Deploy and execute the mapping to load the data.

  6. Difference Between Obtaining Relational and Flat File Source Metadata XSALES Tables The database link extracts Oracle tables metadata. Staging area Oracle Databasemodule:XSALES The flat files are imported and sampled. Flat filesource module:FILE_SOURCE

  7. Source Module • A module is a logical grouping of related objects under a single folder. • Source modules hold metadata describing source systems from which you extract data. OWB 11g does not distinguish between source and target modules

  8. Lesson Agenda • Data warehouse implementation: Typical steps • Metadata to data • Relational and flat file source metadata: Difference • Data sources • Flat file sources • Create a flat file module • Import and sample a flat file • Oracle database sources • Create an Oracle module and import Oracle database objects • View the source tables data

  9. Flat file source FILE_SOURCE customers.txt (delimited) file_geography_multi.csv (multi-record) Relational source XSALES Channels Products Cities ORDERS_SRC Data Sources

  10. Creating a Flat File Source Module 2 1 3

  11. Create Module Wizard: Connection Information Location is the path or the drive and directory in the file system where the flat files reside.

  12. Metadata to Data 1. Initialize and organize the modules. 2. Import the metadata. (This gives you only the data definition.) 3. Use the metadata to define the mapping. 4. Deploy and execute the mapping to load the data.

  13. Importing Source Metadata • You can import and sample the following types of flat files using the Flat Files Sample wizard: • Simple delimited • Fixed-length • Multirecord

  14. Selecting the Flat File for Sampling

  15. View the Sample File

  16. Flat File Sample Wizard: Welcome The Flat File Sample wizard provides the ability to define simple, delimited text files in as few steps as possible.

  17. Describing the File

  18. Sampling Simple Delimited File The Flat File Sample Wizard allows specification of more than one character for record terminators, field delimiters and field enclosures. It recognizes X'hex-value' and x'hex-value' as hex-format where 'hex-value' is 0-9 or A-F.

  19. Setting Field Properties

  20. Flat File Sample Wizard: Summary

  21. Advanced: Record Organization The Sample Wizard enables you to define files that contain logical records.

  22. Advanced: Selecting the File Format Specify the file format to be Delimited or Fixed Length

  23. Advanced: File Layout Select Multi Record if file contains two or more types of records. In the Record Types page, specify the Type Value and their corresponding record names.

  24. Advanced: Field Properties For each record type, you define the fields. This option is available in the Create Flat File wizard or in the Edit Flat File window > Structure link.

  25. Quiz • OWB samples the following types of flat files (select all that apply): • Character-delimited files • Fixed-length files • Multirecord files • Multibyte fixed length

  26. Quiz • Out of the following, which one describes the correct sequence of tasks you perform in OWB to use flat file sources: • Create a flat file module, select the file for import, and then run through the Sampling wizard to define its metadata. • First sample the file to define its metadata, create a flat file module, and then import the flat file.

  27. Lesson Agenda • Data warehouse implementation: Typical steps • Metadata to data • Relational and flat file source metadata: Difference • Data sources • Flat file sources • Create a flat file module • Import and sample a flat file • Oracle database sources • Create an Oracle module and import Oracle database objects • View the source tables data

  28. Data Sources Flat file source FILE_SOURCE customers.txt (delimited) file_geography_multi.csv (multi-record) Relational source XSALES Channels Products Cities ORDERS_SRC

  29. Creating an Oracle Module

  30. Create Module Wizard: Nameand Description ORACLE MODULE NON-ORACLE MODULE For Non-Oracle modules, you can select the access method.

  31. Create Module Wizard: Connection Information

  32. Editing the Oracle Database Location

  33. Finishing Module Creation and Proceeding to Import You can either select "Import after finish" option in the Connection Information page or right-click the module in the Projects Navigator panel, and select Import > Database Objects.

  34. Import Metadata Wizard: Filter Information Filter the objects you want to import

  35. Selecting the Tables for Import Use the arrow to move available objects to the selected list

  36. Completing the Metadata Import

  37. Viewing Data

  38. Quiz • To get the XSALES schema tables as sources, you will perform the following tasks (select all that apply): • Create a separate OWB project • Create an Oracle Module • Edit the module location to point to XSALES schema • Import the selected tables

  39. Summary • In this lesson, you should have learned how to: • Define and create flat file and Oracle modules using the Create Module wizard • Import and sample flat file sources using the File Import and the Flat File Sample wizard • Import relational database objects in an Oracle module • View source data in Data panel

  40. Practice 4-1 Overview: Defining and Importing Flat Files and a Relational Source • This practice covers the following topics: • Creating a flat file source module • Importing two flat files: • customers.txt (delimited) • File_geography_multi.csv (multi-record) • Examining the XSALES Oracle database module • Importing ORDERS_SRC table into the XSALES module.

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