aggregate-function-transformation.pdf

8/17/2019 Aggregate-Function-Transformation.pdf

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Description:BISP is committed to provide BEST learning material tothe beginners and advance learners . In the same series ,

we have prepared a complete end-to end Hands-on guide

for building financial data model in Oracle Data

Integrator.The document focuses on how the real world

requirement should be interpreted. The mapping

document template with very simplified steps and screen

shots makes the complete learning so Easy . The

document focuses on how to calculate the aggregatefunction .Join our professional training program and

learn from experts.

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S.NO TITLE SLIDE NO.

1 Introduction 4

2 Data Model 5

3 ETL Mapping 10

4 Database Connectivity 13

5 Bringing Metadata 19

6 Creating Interface 23

7 Required Output 28

8 Q&A 30

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Calculate Aggregate Function in Target in Oracle Data Integrator .

In this example, we calculate aggregate function in Target . There are

following Step to follow to calculate aggregate function in Oracle Data

Integrator.

Create master and work repository in Oracle Data Integrator.

Import source database and Target table .

create mapping and drag and drop source and target table into

mapping designer window.

Establish a connection of source and target technology with that of

particular database.

Create a model and Reverse Engineering the datastore according to

the technology.

Create new interface inside project and then come to mapping taband make a mapping between source and target datastores.

Then create aggregate transformation to group by column.

Then come to flow tab and define the knowledge module based on

source and target.

Then save and Execute Interface and see the result in operator

navigator and view the result in target datastore

Introduction

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Below Is the Data Model of GoSales

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Source Data

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Target Table StructureBelow is the Table structure of the TRG_ORDER_DETAILS target table in oracle

database.

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TARGET DATA

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What is ETL Mapping document ?

ETL mapping Documents contains source , staging area , target

and the Business Rules Information and it is most important

document for the developer . And Below is my Mapping Document

which contains

Source File Name Source Field Name

Source Field Data Type

Source Field Length

Source Field Description

Business Rule Staging Area

Target Table Name

Target Field Name

Target Field Data Type

Target Field Length10




Source : Used Oracle as my Source Database.

Staging Area : Used oracle as my Staging Area.

Target : Used Oracle as my Target Database.

After Mapping we have to Review from the EndUser and then sign

off From them.

BEFOREMAPPING_ORDERDETAIL.xlsx

AFTERMAPPING_ORDERDETAIL.xlsx

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Staging Area: A place where data is processed before entering the warehouse. Staging Area is temporary location where data from source systems is

copied. A staging area is mainly required in a Data Warehousing Architecture

for timing reasons. In short, all required data must be available before data

can be integrated into the Data Warehouse

Here I have used Scott schema as staging table and you have to define

staging table inside the physical schema at the time when you are establishing

connection between oracle database and oracle data integrator.

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DATABASE CONNECTIVITY IN

ORACLE DATA INTEGRATOR

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Now I have to establish a connection between oracle and ODI .For

establishing A Connection come to the Topology Navigator .select Oracle

as Technology ,Right Click oracle and select New DataServer .In this wehave to provide value to Name , Instance , Dba UserName , Password and

JDBC Driver.

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This will establish a connection between oracle and ODI

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And Now Right click DataServer and select Physical schema . Here you

have To fill information like Schema and work Schema.

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After creating Physical Schema in DataServer which helps in establishing

connection With a particular schema , Now Create a context like Development ,

production and Testing Which helps to make a mapping between physical and

logical Architecture.

How to create context ? Just click on the context tab and then on the Right side of context tab you will

find new Context options ,select that “New Context” and create a context for

Development ,Production and Testing and If anything else is there than createthat one also.

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After Context create a Logical Schema for Oracle .

How to create Logical Schema ?

Click on Logical Architecture ,Then select oracle technology .Right Clickoracle and Select logical schema and provide information as shown in

below diagram.

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HOW TO BRING METADATA

FROM DATABASE TO

ORACLE DATA INTEGRATOR

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After establishing a connection between oracle and ODI ,go to the Designer

Navigator Here you have to bring the metadata of customertrans datastore .For

this you have to create Model folder and sub model for organizing datastore.Right click LOAD_ORACLE ,

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And Select New Model and fill all details provided in previous sheet and then

select Reverse Engineering Button ,It will bring all the datastore available in thesales schema

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After bringing metadata from particular datastore on the

model tab , click on the Project tab and here we have to applythe Required Business Rules using interfaces How to

implement business rule in project tab ?

Go to the Project tab , Expand first folder .Here you will find

interface . Right click interface and select new interface .It willopen interface window , here you will provide Name of the

Interface , Optimization context . Now click on the mapping

tab . Here you will get 2 window one for the source and other

for target like I am showing in the next

Screen .

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CREATING INTERFACE IN

ODI

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Here I have inactivate all the columns which I don‟t required by just click

Particular column it will open property window and there uncheck Active

Mapping.

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Click on the flow tab there you have to define required knowledge

module and Make the option true or false depend on your requirement

and then save and execute.By default staging area is in the target

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Below is the background code executed by odi for Aggregate Function min using

group by clause.

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REQUIRED OUTPUT

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After successfully executing the interface select again target interface , Right

Click target interface and select „data‟ .It will show the required output.

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