Data set

In this job, Path the path is the file columns load (SCD)

 

Oracle enterprise 

Table name =  dim 2

Write method  = upset (up date and insert)

Upset order = update then insert

Compile and Run

 

GO to SQL plus 

Select * from dim2;

 

TO insert new values 

• Delete SRC ;
• Insert into SRC values (111,”Smitha”);

Insert in to SRC values (444, “Anu”);

 

• Compile and RUN Job (a);

Compile and RUN Job  (a);

Output 

 

Skid                             S no                   S name                  Es – date       Ee- date        ACF

———————————————————————————————————–

1                                       111                    Shilpa                                                                Y

2                                         222                   Reruka                                                            Y

3                                         333                 Archana                                                          Y

4                                         111                 Sumathi                                                            Y

 

7.5 version

 

SCD 1 and 2

SCD’s are implemented in 7 using change capture  and change apply.  (SCD 1)

Change Capture 

Capture the changes between before data and After data and generates change code.

SCD 1

SCD – II :-  (7.5 version)

 

 

 

If code =1 ,ten ESS –date = current data

EE –date =”9999-12-31”

Code =2

ee-dab =current date -1

Surrogate key Stage

• Alternative primary key
• Generates Sequence number
• Surrogate key Stage differs completely in stage and version in 7.5 and 8.0.1

Q: Column Generator also  generates Sequence number, So why do we use Surrogate key ?

 

Sol:    Surrogate Key

we can pass the values with parameters

Can pass the parameter in runtime

Parameterization is possible

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Column Generator 

• We can’t do
• version :-

1. How to create Sequence
2. How to restart Sequence

Q:  How can you update parameter values

Sol:-   APS, Routines

Job :-  (Source Type  = flat file)

 

Surrogate  key 

Generated output column name = SKID

Source Name  = C : /Skid. TxtEmpty file

Source Type  = flat file  output  DO mapping Drag SKID to top

Compile and RUN

Generate Sequence no. 1 to 14^th for 14 records

When it is RUN for the 2^nd time

Sequence status from 15, 16

 

To identify the last highest value

 

 

Job :-  (Surrogate  key Generator)

Source Type  = Data Sequence

Source name = C :/Skid.txt  Empty  file namelast generated value is storedrecalls the last generated, it status increment valueprocess is auto missedàlast generated value can also be stored in data base

 

Job:-   (Source type = Sequence Data base)

 

Source type  = data type Sequence

Data base type = oracle

Oracle server name = oracle

Password = tiger

Username = Scott

Source name = shilpa

In SQL plus,   create a data base Sequence objectCreate sequence shilpa;   Sequence createdOutputDo mapping

For indepth understanding of DataStage click on

• Introduction to DataStage
• Architecture of Data Stage
• Oracle Enterprise in Data Stage
• SCD(Slow changing Dimension) in Data Stage
• DataStage Tutorials