CapGemini Datastage Exercise

8/18/2019 CapGemini Datastage Exercise

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Training course Datastage (part 1)Training course Datastage (part 1)

V. BEYETV. BEYET

03/07/2006 03/07/2006


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Presentation ...Presentation ...

Who am I ? Who am I ?

Who are you ? Who are you ?


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Summar

General presentation (DataStage : what is it ?)

DataStage : how to use it ?

The other components (part 2)


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!enera" presentation

Datastage : What is it ?

An ETL tool: Extract-Transform-Load

A graphic environment

A tool integrated in a suite of BI tools

Developed by Ascential IB!"


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Datastage : why to use it ?

big si#e of data volume"

multi-source and multi-target :

files$ Databases oracle$ s%lserver$ access$ &"'

Data transformation : (elect$ )ormat$ *ombine$ Aggregate (ort'



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Datastage : how it wors ?

Development is done :

on a client-server mode$

+ith a graphical Design of flo+s$

+ith simple and basic elements$ +ith a simple language basic"'

Treatments are : *ompiled and run by an engine$

,ritten on a niverse database$



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T#e $i%%erent too"s

Server Server

Designer Designer Manager Manager

Administrator Administrator Director Director



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Server Server

The ser!er contains programs an" "ata.

The programs

*alled .obs : first as source code and then asexecutable programs$ +ritten in niverse Database

But +e can/t understand source code

Data : !ay be +ritten in niverse Database but better in

server directories'



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Server Server

What is a Pro#ect $or Datastage ?

A server is organi#ed in different environments called

01ro2ects3

A 1ro2ect is a separated environment for 2obs$ table

definitions and routines

A 1ro2ect can be created at any time

The number of pro2ects is unlimited

The number of 2obs is unlimited for each pro2ect But the number of simultaneous client connection islimited



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Servur Servur

%ni!erse Data&ase:

The niverse Database is a relational Database +ith files

Tables are called 45ash )ile4

A 5ash file is an indexed file6 It/s the central element to use all

the possibilities of the Datastage engine'

A Hash file with incorrectly defined keys may create disastrous problems.



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General presentation (Datastage : what is it ?)

DataStage : how to use it ?

The other components (part 2)

Summar


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T#e $esigner

The "esigner is to "esign #o&s & loo at the icon

The #o&s are compose" with ' Stages :

active stages : action

passive stages : data storageLin7s : bet+een the stages

Designer Designer


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T#e $esigner

1assive stages : a place for Data storage the

data flo+ is from the stage or to the stage"

Text )ile : se%uential file

5ash )ile : It can be treated only by

datastage and not by ,ord1ad$ &" but

simultaneous access is possible on 5ash file'

8 (tage : The file is in the niverse *ore

Data(tage engine"'

9DB* (tage$ 9LEDB$ 9A9*I :

epresentation of a database6 it allo+s to

access directly to a database +ith an 9DB*

lin7'

Designer Designer


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Active stagesAn active stage is a representation of a transformation on the dataflo+ :

Designer Designer

T#e $esigner

(ort : of a file

Aggregator : calculations

Transformer : selection$ transformation$ transport of properties

&


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lin7s

Designer Designer

T#e $esigner

Bet+een active and passive stages

Bet+een passive stages

Bet+een active stages


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T#e $esigner

* #o& in the "esigner

Designer Designer

1assive (tageActive (tage


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T#e $esigner Designer Designer

Data(tage Designer :

Each 2ob has :

- one or more source of data

- one or more transformation- one or more destination for the data

The toolbar contains the stage icons to designthe 2obs'

The 2obs have to be compiled to createexecutable programs'


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The repository

The toolbar+ith stageicons

palette"

To compile the 2ob

To run the 2ob


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Let/s study no+ the different (tages :

(e%uential )iles text files"Transformer

5ash )iles(ortAggregatoroutines8 (tages


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(e%uential file (tage :

*an be read$ *an be +ritten$

*an be read and +ritten in the same 2ob$ *an be +ritten cash or not$ *an be D9( file or nix file & *an be read by t+o 2obs at the same time

*an/t be +ritten by t+o 2obs at the same time



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T#e $esigner

(e%uential )ile :

Designer Designer

(tage name

)ile Type

(tage description


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(e%uential )ile :

9utput lin7

(tage name to be +ritten"


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(e%uential )ile :

Data )ormat 9utput file"

Al+ays those values


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(e%uential )ile : To test the connection andvie+ the data in the file

Different columns of thefile 9utput" : type$ length

(i#e to displayfor 8ie+ Data"


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;roup your tabledefinitions byapplication

*reate or modify the tabledefinitions for files$databases$ transformers$ &"


To describe easily a file :use or create a 0tabledefinition3

(e%uential )ile :


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Then it can be used in different 2obs clic7 on Load to find the rightdefinition"'


(e%uential )ile :


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8ie+ Data


(e%uential )ile :


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Transformer (tage :

!ulti-source and multi-target$

,ait for the availability of the source of data$ !a7es loo7up bet+een < flo+s reference"$ Transform or propagate the data of each flo+$ Allo+s to select$ filter$ create refusals file'



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Transformer (tage :

*an do treatments by :

native basic function or created in the manager$ Data(tage function or Data(tage macro$ routines before=after type" 9r only propagate columns'



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Transformer (tage :


Input data9utput data

ight clic7 :propagate allthe columns


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Input data

9utput data

Transformer (tage :


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Exercise n°1 :Objective : Read a sequential file and create a new one sa!e t"e file#

$"e catalo%ue&in file "as to 'e read and t"e catalo%ue(sa!e&t)* file "as to 'e written

+ource ,ile : catalo%ue&in in -in director.#

$ar%et ,ile : catalo%ue(sa!e&t)* in -t)* director.#

+te*s :

1/ reate a ta'le definition structure of atalo%ue ta'le #

2/ esi%n t"e o' wit" 2 +equential ,iles and 1 $ransfor)er

3/ reate t"e lins data flow#

4/ +a!e and o)*ile t"e o'

5/ Run t"e o'

6/oo at t"e *erfor)ances statistics ri%"t clic#



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Loo7 at the performances of your 2ob :

ight clic7 on the grid and then select

0(ho+ performance statistics3


Transformer (tage :


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*reate the parameters of the 2ob :

)enu Edit / o' ro*erties ta' ara)eters&



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Exercise n°2 :

Objective : se en!iron)ent !aria'les

/ create a o' *ara)eter : director.

/ *lace it on all t"e *at"s fro) t"e o' of t"e first

exercise exa)*le : director.-t)*#

/ co)*ile

/ )odif. .our in*ut file add .our 'est fil)#

/ run wit" different *at" ot"er %rou*s#&



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5ash )ile (tage :


>ecessary for a loo7up

9ne 5ash file is entirely +ritten before it can beread )romTrans lin7 must be finished before )rom)ilmType5)can start"Allo+s to group multiple records +ith the same7ey suppress duplicate 7eys"*an be read in different 2obs simultaneously

*an be +ritten by different lin7s simultaneouslyin the same 2ob or in different 2obs"


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5ash )ile :


(tage name

Account nameData(tage pro2ect"

)ile path


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5ash )ile : )ile name

)or files to +rite

(elect this chec7 box tospecify that all recordsshould be cached$ ratherthan +ritten to the hashedfile immediately' This isnot recommended +here your 2ob +rites and readsto the same hashed file inthe same stream ofexecution


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A 7ey must be defined it can be a single or multiple 7ey"


5ash )ile :


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(tage Transformer : Loo7up? The main flo+ can be from every type

? The secondary flo+ must has a 5ash )ile to design a loo7up so veryoften$ you +ill have to design a temporary 5ash )ile"

? The loo7 up is done +ith the 7ey of the secondary flo+

? The number of records in the main flo+ can/t be higher after theloo7up than before the loo7 up

? The loo7up is sho+n +ith a dotted line

? ,hen a loo7up is 0exclusive3 the number of records after the loo7upis smaller then the number of records before the loo7up



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Transformer (tage : Loo7up

1rincipal )lo+hori#ontal"

eference )lo+vertical flo+"


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Exercise n°3 : Objective : )ae a loou* 'etween atalo% file and ,il) $.*e

to *ut t"e t.*e fil) in t"e out*ut file&

+ource ,ile : catalo%ue&in in -in director.#

$ar%et ,ile : catalo%ue&out in -out director.#

+te*s :

1/ reate a ta'le definition structure of ,il)$.*e ta'le #

2/ odif. .our o' to create a ;as" ,ile fro) t"e ,il)$.*e&in file

3/ reate t"e lin to s"ow t"e loou* data flow#4/ +a!e and o)*ile t"e o'

5/ Run t"e o'

6/oo at t"e *erfor)ances statistics ri%"t clic#



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Exercise n°4 : Objective : *ut t"e director na)e and t"e fil) na)e to%et"er

se*arated '. a & ?f t"e fil) t.*e is not found *ut in t"e out*ut file& @"at "a**ens w"en t"e director na)e is

e)*t. A ,ind a solution&



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Exercise n°5 : Objective : ?f t"e fil) t.*e is not found use constraint# *ut t"e

fil) in a refusals file ,irst a +equential file and t"en a ;as"

,ile#



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(tage Loo7up +ith selection exclusive loo7up"

Don't %orget & "ooup can e $esigne$ *it# +,-+ stage or V stage ut it is more

etter *it# as# i"es.



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Exercise n°6 : Objective : +elect onl. t"e fil)s for w"ic" t"e t.*e is nown

t"at )eans t"at t"e loou* is BC#


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Exercise n°7 : Objective : +elect all t"e clients w"o are fe)ale to *ut t"e) in

an out*ut file$"e +EDE colu)n contains ale# or , fe)ale#

nd t"en create an annotation for t"is o' all t"e o's )ust "a!e annotations#



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T#e $irector Director Director

The Director is the 2ob controller$ it allo+s to :

un 2obs

Immediately or later$ +ith more options than in the Designer

*ontrol 2ob status

(tatus : *ompiled$ unning$ Aborted$ 8alidated$ )ailed validation '''

.ob monitoring

To control the number of lines treated by each active stage of a 2ob'


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un 2obs +ith Director


(elect the 2ob andclic7 here

And then enterthe parameters


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To run a 2ob later :

Director Director T#e $irector

clic7 here

And then choosethe date and time


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To modify running parameters for a 2ob : Limits Tab


,arnings limit : the 2obstops after x +arnings

o+s limit : the 2ob stops after xro+s on each flo+"


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8erify the status of 2obs +ith Director

The status :? 4>ot compiled4

? 4*ompiled4

? 4)ailed validation4

? 48alidated o74

? 4Aborted4? 4)inished4

? 4unning4



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Director Director

Example : list of 2obs

T#e $irector

To run 2obs To stop 2obs To run 2obs laterTo vie+ the log To reset 2ob status


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Example of a !onitor :

Director Director

)or each step : the number of treated lines input and output"the beginning timethe execution duration Elapsed time"the statusthe performance ro+s=sec"

T#e $irector

Lin7 type :1ri : principal flo+

ef : reference flo+ loo7up"9ut : output flo+

The monitor allo+s to follo+ the

different stages of a 2ob' (eethe importance of a good namefor the stages and the lin7s @


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Example of a log :


;reen : 9 >o problemCello+ : +arninged : bloc7ing problem

Don't %orget & "ear t#e "og %rom time to time (o4"ear "og).

To loo7 at error messages$choose the 2ob and clic7 on the0log3 button


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All the elements :

? 2obs

?outines

?table definitions

are classified in *ategories but the

name must be uni%ue +ithin a pro2ect

T#e manager

The manager is the tool to export=import elements from a

Data(tage pro2ect to an other Data(tage pro2ect'

Manager Manager

To import or export elements clic7 on

the appropriate button

)ile9pen 1ro2ect to change pro2ect

Drag and Drop on an element to changecategory


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E19T

Manager Manager

T#e manager

To append to anexisting file

To change the selectionoptions :

- By category

- By individual components

?.obs

?outines al+ays chec70(ource *ode3 box"

?Table definitions

choose +hat do you +ant to export create a 'dsx"


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I!19T

Manager Manager

T#e manager

This +ill create=modify elements inthe Data(tage 1ro2ect

!a7e your choice

choose +hat do you +ant to import


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,ith the manager$ you can compile many 2obs at the same time multiple compile

2obs"

Tools un multiple 2ob compile

you select the type of 2obs you +ant to compile and select 0(ho+ manual

selection page3 and clic7 on 0>ext3 button

select the 2obs and clic7 on 0>ext3 button

clic7 on the 0(tart compile3 button

Manager Manager

T#e manager


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(ort (tage :


*riteria of sorting are filled in

In (tage Tab=1roperties Tab

!odify those parameters if thefile to sort has a lot of lines


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Exercise n°8 : Objective : @"en .ou "a!e selected all t"e @o)en sort t"e file

'. al*"a'etical order&



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Aggregator (tage :

- Allo+s data to be aggregated on a smaller number ofrecords$

- Intermediate treatments executed in memory$- Allo+s to execute a before=after routine before or afterthe stage treatment +hen all the lines have been treated"$

- 1erformances are better if data is sorted Input tab"$

- The aggregator does not sort the records'



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Aggregator (tage : Input Tab


,hen input datais sorted


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Aggregator (tage : 9utput tab


;roup by

Differentfunctions


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Exercise n°9 :

Objective : create a o' w"ic" reads location&innd calculates t"e "it/*arade fro) t"e )ost "ired cassettes

order '. nu)'er of "ire descendin%#& ut also t"e na)e of t"e

fil) and not onl. t"e nu)'er of t"e cassette loou* wit"

catalo%ue&in#&



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Exercise n°10 :

Objective : create a o' w"ic" reads location&innd calculates t"e a!era%e nu)'er of "ire for eac" cassette&2 different )et"ods can 'e used#


DD i


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Exercise n°9 o' to desi%n#


D iD i


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D iD i


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5ash )ile (tage : ,e have seen that the 5ash )ile is necessary for a loo7up

,e have seen also that 5ash )ile allo+s to suppressduplicate 7ey

Let/s see no+ ho+ it is useful to group different flo+s


D iD i


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Exercise n°11 :

Objective : @it" t"e o' fro) exercise 10 use t"e 2 )et"ods in

t"e sa)e o'# create a ;as" ,ile to *ut t"e different results in t"e

sa)e ;as" ,ile&olu)n 1 : or

olu)n 2 : t"e result of eac" )et"od

?n t"e ;as" file .ou )ust "a!e 2 lines&


DesignerDesigner


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DesignerDesigner


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(tage 8ariables : (imple treatments can be made easily +ith stage variable'

- It is a data +hich remain 0active3 during all the duration of the stage' (o youcan find a max if data is sorted"$ calculate a sum or count something'

- In the transformer$ clic7 on the right button and then select 0(ho+ (tagevariables3' Example :


T# $ i DesignerDesigner


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Another example :

T# $ i

DesignerDesigner


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Exercise n°12 :

Objective : $r. to calculate t"e a!era%e wit" sta%e !aria'les&


Exercise n°13 :

Objective : reate a o' t"at create a file wit" all t"e client e.#and in a second colu)n t"e list of t"e fil)s se*arated '. a dot#&

T# $ iDesignerDesigner


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Exercise n°13 o' to desi%n#T#e or$er o% t#e $i%%erent 5aria"es is important. T#e instructions are eecute$ in t#e

or$er o% t#e stage 5aria"es (to c#ange t#e or$er 84 rig#t c"ic4stage properties49in

or$ering Ta)

T#e 5aria"es must e initia"i:e$ (84 rig#t c"ic4stage properties45aria"es).

T#ere must e a #as# %i"e a%ter t#e stage.



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Data(tage 8ariables : Different variables are defined by Datastage :-F>LL

- FI>9,>!$ F9T9,>!

- FDATE

- FTE$ F)AL(E

- F1AT5


Lin7 8ariables : The more useful is : >9T)9>D

T# $ iDesigner Designer


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outines :

- (ource code +ritten +ith Basic language"

- It is external from the 2obs and can be used many times at many

levels- It can be a Transform function or a Before=After )unction :

a transform function is called at each line

a before subroutine is called before the first lineexample : empty a file"

an after subroutine is called +hen all the lines have beentreated

T#e $esigner Designer esigne

T# $ i Designer Designer


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outines G=H"

T#e $esigner gg

Type of routine>ame of the routine

Al+ays fill in this(hort description

T# $ i Designer Designer


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outines


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T#e $esigner gg

outines H=H"

*ode : useArgument names

(ave *ompileTest oftheroutine



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T#e $esigner g

outines : access to a se%uential file

*lose(e% )ic

9pen(e% )ic to xxx thenendelseend

,rite(e% )ic to xxx thenendelseend

ead(e% )ic to xxx thenendelse

end

)ile 5eader

,eof(e% xxx To empty the file



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T#e $esigner

outines :

If & Then

End

Else

End

;oTo

)or i & To

>ext i

Loop ,hileepeat

Loop ntilepeat

*all D(LogInfo4Information4$ Houtine>ame4"*all D(Log,arn4,arning4$ 4outine>ame4"*all D(Log)atal4Abort4$ 4outine>ame4"

AJ5ello /

BJ,orld/*A:B

*J5ello ,orld/

field&$K$K$H$G" search string file after the third comma

Trim&$ / /$/T/" suppress the trailing spaces

pcase&"

Iconv4MN=


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T#e $esigner

outines : Test

By double-clic7 on esult column

T#e $esigner

Designer Designer


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Exercise n°14 :

+te* 1 :

Objective : write a routine w"ic" calculates t"e nu)'er of da.

'etween two dates&

?f 'e%in date is null t"en return 0

?f end date is null t"en initialiIe it wit" date of toda.

+a!e co)*ile and test t"e routine&

T#e $esigner



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T#e $esigner

T#e $esigner

Designer Designer


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Exercise n°14 :

+te* 2

Objective : Read location&in %enerate a file wit" t"e "ire

duration returned cassettes onl.#

Jon returned cassettes after 10 da.s end date null# will 'e

written in a refusals file wit" t"e na)e and address of client to

send t"en a )ail#

T#e $esigner



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Exercise n°14 o' to 'e desi%ned#

T#e $esigner

T#e $esigner

Designer Designer


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Exercise n°15 :

Objective : @it" a routine se +E # calculate t"e a)ount

for t"e cassette "ire da.s nu)'er K "ire *rice K coefficient#&

$"e coefficient is calculated wit" t"at rule :L5 da.s M da.s K "ire *rice

=M5 and L10 da.s M da.s K "ire *rice K 1&20

=M10 and L30 da.s M da.s K "ire *rice K 1&50

=M 30 da.s M da.s K "ire *rice K 3

T#e $esigner



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8 (tage : +or7s +ith internal hash file in the Data(tage 1ro2ect"

ma7es a *artesian product

uses (L re%uests select & from & +here & order by &"

T#e $esigner

T#e $esigner

Designer Designer


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Exercise n°16 : execute t"e artesian *roduct on lients file

and assettes file

Objective : ro*ose to t"e clients cassettes "e "as ne!er "ired

N+te* 1 : create t"e o' *ara)eter

N+te* 2 : create a o' to write clients "as" file et cassettes "as" file

in t"e + *roect wit" account *ara)eter N+te* 3 : ?n a new o' use t"ose "as" files to )ae t"e artesian

*roduct

Noo at .our o' *erfor)ances OO

T#e $esigner



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Exercise 16 : +te* 1 and +te* 2

T#e $esigner



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+te* 3 :

T#e $esigner



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T#e $esigner



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T#e $esigner

The number of records



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Jor)aliIation :

#e $esigne

12 PQPPPE

12

12 Q

12

12

12 E

The normali#ation :

n/nor)aliIation :

!ulti-valuated file >ormali#ed file



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>ormali#ation :

g

!ulti-valuated file must have :

G- a 7ey


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Exercise n°17 : nor)aliIationun/nor)aliIationN+te* 1 : create a o' w"ic" reads location&in file and writes a "as"

file ?d(li as t"e e. and t"e list of all ?d(as se*arated '.

SF# : use +ort sta%e and +ta%e Faria'les O

M= View Data on the Input ink of the Hash !ile

N+te* 2 : )odif. t"e a o' to add nor)aliIation of t"is file

M= View Data on the "utput ink of the Hash !ile

N+te* 3 : o)*are t"e sequential file wit" location&in file

g



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g

Exercise J°17 : o' to desi%n and Fiew ata



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g

The 9A9*I (tages :

The version of oracle used is Pi so use 9A9*IP stage Cou can :

Either use a %uery generated by Data(tage

9r use a user-defined %uery9r a combination of the both precedent possibilities

The access parameters have to be defined by 2ob parameters The stage can access only one table or more Different actions can be programmed : read$ insert$ update

Cou can also use (toc7ed 1rocedures



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g

The 9A9*I (tages :The access parameters have to be defined by 2ob parameters



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g

The 9A9*I (tages : 9utput lin7

%uery generated byData(tage or user-defined %uery



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(election of the tables"

(election ofthecolumns

0;roup by3clause

(ort parameters%uery generated

by Data(tage



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;enerate (ELE*T clause from column list6 enter other clauses



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Enter custom (L statement : +hen you +ant to add something specific

To format a date for

example



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*hoose the table

*hoose the action

Important parameters



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>umber of lines

bet+een < commit



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The 9A9*I (tages : verify error code G=H"

If the 2ob must abort+hen there is a(L error



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The 9A9*I (tages : verify error code


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The 9A9*I (tages : verify error code H=H"

Treat lines G by G

To receive (L error code

To select the errors



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The 9A Bul7 (tages :

- to insert in a table li7e (LL9AD"

- 8ery fast deactivate the index before the load and reactivate itafter the load"

- But no +arning if the index is in nusable state after the load

+hen duplicate 7eys for example"- >ot a lot of Date and Time format DD'!!'CCCC$ CCCC-!!-DD$ DD-

!9>-CCCC$ !!=DD=CCCC - hh


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The 9A Bul7 (tages

D(>

Date and Time format

pass+ord

Table name +ith

oracle'table>ame"

>umber of lines bet+een

< *ommit

user



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113

5o+ to create a table definition from a table in the database U

9n the repository$

right clic7 on Table Definitions

and then choose 0Import3

and then 1lug-in !eta Data

Definitions

T#e $esigner

Designer Designer


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Then choose the table s" and clic7 on 0Import3

The table definitions +ill be created in the category 09DB*3



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115

Exercise n°18 : Read a ata'ase

Objective : reate a o' w"ic" reads t"e ta'le

RE,($E in Q?B+ data'ase

+te* 1 : create t"e ta'le definition fro) t"e data'ase

+te* 2 : create t"e o' t"at reads t"e ta'le



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116

Exercise n°19 : @rite in a ata'ase

Objective : reate a o' w"ic" writes in t"e ta'le$+$(?J(GF in Q?B+ data'ase onl. t"e 2 first

colu)ns : e.s#

ocation&in $+$(?J(GF :?d(li MMMMMMMM == ;R1

?d(as MMMMMMMM == ;R2

?n ;R1 *ut a letter different for eac" %rou*# 'efore t"e client nu)'er ?d(li#&

Step # : se BRB? sta%e

Step $ : +a)e exercise wit" BRQC sta%e



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117

Exercise n°20 : *date a ata'ase

Objective : reate a o' to u*date t"e colu)nsQEG?J($E and EJ($E in t"e ta'le

$+$(?J(GF in Q?B+ data'ase fro) location&in file

QEG?J($E and EJ($E are defined as ti)esta)* O

Administrator Administrator T#e a$ministrator


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118

The *"ministrator :

*reate a Data(tage pro2ect

nloc7 a 2ob

(ometimes$ due to server problems$ the designer or manager" falls do+n and

some elements may be loc7ed 2obs$ table definitions$ routines$ &"In that case$ in the Administrator +ith administrator security rights" :



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119

nloc7 a 2ob G=H"

choose your pro2ect

And clic7 on

*ommand button

To create a pro2ect



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120

nloc7 a 2ob


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121

unloc7 your 2ob +ith device number

nloc7 a 2ob H=H"

or +ith user number>L9* (E ser>umber EADL9*"9r everything>L9* ALL"



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1ro2ect name

*reate a pro2ectLocation for the 1ro2ect 2obs$

routines$ 8 hash files$ table

definitions$ &" on the server' !ust be

different from the location for the

directories of data @

Documents

CapGemini Datastage Exercise