4 Copyright © 2009, Oracle. All rights reserved. Defining Source Metadata

Copyright © 2009, Oracle. All rights reserved 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

Copyright © 2009, Oracle. All rights reserved 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

Copyright © 2009, Oracle. All rights reserved Data Warehouse Implementation: Typical Steps 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. Part 1 Part 2

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Copyright © 2009, Oracle. All rights reserved 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.

Copyright © 2009, Oracle. All rights reserved Difference Between Obtaining Relational and Flat File Source Metadata Flat file source module: FILE_SOURCE Staging area The database link extracts Oracle tables metadata. XSALES Tables The flat files are imported and sampled. Oracle Database module: XSALES

Copyright © 2009, Oracle. All rights reserved 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

Copyright © 2009, Oracle. All rights reserved 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

Copyright © 2009, Oracle. All rights reserved Data Sources Flat file source customers.txt (delimited) Relational source Channels Products Cities XSALES file_geography_multi.csv (multi-record) FILE_SOURCE ORDERS_SRC

Copyright © 2009, Oracle. All rights reserved Creating a Flat File Source Module 1 2 3

Copyright © 2009, Oracle. All rights reserved Create Module Wizard: Connection Information Location is the path or the drive and directory in the file system where the flat files reside.

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Copyright © 2009, Oracle. All rights reserved 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.

Copyright © 2009, Oracle. All rights reserved 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

Copyright © 2009, Oracle. All rights reserved Selecting the Flat File for Sampling

Copyright © 2009, Oracle. All rights reserved View the Sample File

Copyright © 2009, Oracle. All rights reserved 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.

Copyright © 2009, Oracle. All rights reserved Describing the File

Copyright © 2009, Oracle. All rights reserved 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.

Copyright © 2009, Oracle. All rights reserved Setting Field Properties

Copyright © 2009, Oracle. All rights reserved Flat File Sample Wizard: Summary

Copyright © 2009, Oracle. All rights reserved Advanced: Record Organization The Sample Wizard enables you to define files that contain logical records.

Copyright © 2009, Oracle. All rights reserved Advanced: Selecting the File Format Specify the file format to be Delimited or Fixed Length

Copyright © 2009, Oracle. All rights reserved 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.

Copyright © 2009, Oracle. All rights reserved Advanced: Field Properties This option is available in the Create Flat File wizard or in the Edit Flat File window > Structure link. For each record type, you define the fields.

Copyright © 2009, Oracle. All rights reserved Quiz OWB samples the following types of flat files (select all that apply): a.Character-delimited files b.Fixed-length files c.Multirecord files d.Multibyte fixed length

Copyright © 2009, Oracle. All rights reserved Quiz Out of the following, which one describes the correct sequence of tasks you perform in OWB to use flat file sources: a.Create a flat file module, select the file for import, and then run through the Sampling wizard to define its metadata. b.First sample the file to define its metadata, create a flat file module, and then import the flat file.

Copyright © 2009, Oracle. All rights reserved 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

Copyright © 2009, Oracle. All rights reserved Data Sources Flat file source customers.txt (delimited) Relational source Channels Products Cities XSALES file_geography_multi.csv (multi-record) FILE_SOURCE ORDERS_SRC

Copyright © 2009, Oracle. All rights reserved Creating an Oracle Module

Copyright © 2009, Oracle. All rights reserved Create Module Wizard: Name and Description For Non-Oracle modules, you can select the access method. ORACLE MODULE NON-ORACLE MODULE

Copyright © 2009, Oracle. All rights reserved Create Module Wizard: Connection Information

Copyright © 2009, Oracle. All rights reserved Editing the Oracle Database Location

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Copyright © 2009, Oracle. All rights reserved 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.

Copyright © 2009, Oracle. All rights reserved Import Metadata Wizard: Filter Information Filter the objects you want to import

Copyright © 2009, Oracle. All rights reserved Selecting the Tables for Import Use the arrow to move available objects to the selected list

Copyright © 2009, Oracle. All rights reserved Completing the Metadata Import

Copyright © 2009, Oracle. All rights reserved Viewing Data

Copyright © 2009, Oracle. All rights reserved Quiz To get the XSALES schema tables as sources, you will perform the following tasks (select all that apply): a.Create a separate OWB project b.Create an Oracle Module c.Edit the module location to point to XSALES schema d.Import the selected tables

Copyright © 2009, Oracle. All rights reserved 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

Copyright © 2009, Oracle. All rights reserved 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.

Copyright © 2009, Oracle. All rights reserved