PowerCenter Level1 Unit03

7/17/2019 PowerCenter Level1 Unit03

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Unit 3. Source Qualifier

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Unit Objectives

Understand when and how to use:

Source Qualifier transformation

Source Qualifier join

Overall lab project

Create and run pass through mappings

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Source Qualifier Transformation

Unit 3

Active

Ports epresent table columnsor file fields

All input!output "#!O$

Usage %andator& for flat file and

relational table sources Converts source datat&pesto PowerCenter datat&pes

'or relational sources(selects onl& columns usedin mapping

Selects records from flat file and relational table

sources) 'or relational tables( creates a SQ* S+*+C,)


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Datatype Conversion

,ransformation datat&pes allow mix and matchof source and target database t&pes -hen connecting ports( native and transformation datat&pes must be compatible

"or must be e.plicitl& converted$

!T"#$ D!T!T%&$S T'!S(O')!T"O D!T!T%&$S

Specific to the source and targetdatabase t&pes

PowerCenter internal datat&pes

/ispla& in source and target tableswithin %apping /esigner

/ispla& in transformations within%apping /esigner

ativeative

Transformation

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#elocity )et+o,olo-y

"n labs /e /ill use "nformatica0s #elocity met+o,olo-y

Templates

%apping specification templates

Source to target field matri.( 0

amin- conventions

Object t&pe prefi.es: m1( e.p1( agg1( wfl1( s1( 0

est practices

*oo2 for icon in labs

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ab Data )o,el 5)ersc+e )otors Data 6are+ouse

3ote: ,he fact tables have shared "conformed$ dimensions

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T/o8&+ase &rocess usin- Sta-in- !rea

SourcesStaging

Area

/ata

-arehouse

+,* Phase 4

"*abs 456$

+,* Phase 7

"*abs 8579$

Relational tablesComma-delimited flat filesFixed-width flat file

Relational tables

Relational tables

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abs 5 Typical Se:uence

Tool Step

/esigner 4) #mport!create source metadata

7) #mport!create target metadata

) Create mapping

-or2flow %anager ;) Create wor2flow


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Unit 3 ab ! oa, &ayment Sta-in- Table

SourcesStaging

Area

&ayment Data ?&!%)$T


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ab ! 'evie/

-hat did we accomplish with this lab>

Questions>

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Bomo-eneous oin

?oins combine data from different records

@omogeneousjoins combine data from tables within the same databaserelated b& primar& and foreign 2e&s in the PowerCenter source definitions

Specif& homogeneous joins in a Source Qualifier transformation

,he join is performed on the source database at runtime "when SQ*generated b& the Source Qualifier e.ecutes$

Primar&!foreign2e& relationship

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User Define, Source Qualifier oin

+nter join condition e)g)

tablea)emplo&ee1idtableb)emplo&ee1id

/efault is inner join B specif& other join t&pes

"covered later$ in the User /efined ?oin attribute

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Unit 3 ab . oa, &ro,uct Sta-in- Table

SourcesStaging

Area

ST>?&'ODUCT


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ab 'evie/


Questions>

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Source &ipelines

+ach Source Qualifier transformation starts a singlesource pipeline

A mapping can have multiple source pipelines)

,ransformations can split one source pipeline intomultiple pipeline branches

Sourcepipeline 7 pipelinebranches

,

,

, ,

, ,

,

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Unit 3 ab C. oa, Dealers+ip &romotions Sta-in- Tables

SourcesStaging

Area

ab C Dealers+ip Data ?D$!$'SB"&

ST>?&'O)OT"OS


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ab C 'evie/


Questions>

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Unit 3 QuiE

4) -hen would &ou use a Source Qualifier transformation>

7) -hat 2inds of ports does it have>

) @ow can &ou use it to join two sources>

Unit 3

Documents

PowerCenter Level1 Unit03