Question { IBM, 5270 }

Explain briefly scd type2 in datastage7.5x2(parallel)

Answer

scd2: slowly changing dimension 2

SCD2 is used to maintain both current data and historical
data.
for ex: If we are having following data
cid cname city country
101 raju hyderabad India

if we want to implement scd2 for the above data we need to
create target table with columns

scid cname city country flag version date
scid - surrogate key column

and if the customer moves from hyderabad to delhi then the
output will be

scid cname city country flag version
1 raju hyderabad India 0 1
2 raju delhi India 1 2

Flag = 0 defines historical data
Flag = 1 defines current data

Similarly if again raju moves from delhi to mumbai the the
output will be

scid cname city country flag version
1 raju hyderabad India 0 1
2 raju delhi India 0 2
2 raju mumbai India 1 3
n so on..

Question { 8577 }

Source flat file contains
src
---
1
2
'
'
'
18
we had 3 targets
T1 T2 T3
-- -- --
1 4 7
2 5 8
3 6 9
10 13 16
11 14 17
12 15 18

How can i get?
**Using only datastage, but not unix or any other.
I am expecting the answer soon..
Thanks in advance.

Answer

source----->transformer----->filter------>T1
|
|
--------->T2
|
|
--------->T3
Transformer:
1.drag source column to target.
2.append new column in transformer target as new and apply derivation Mod(input column, 3).

Filter:
where condition1 new = 1
condition2 new = 2
condition3 new = 0

Name the three targets T1, T2, T3.

Question { IBM, 10889 }

Out of 4 mill records only 3 mill records are loaded to
target
and then job aborted. How to load only those 1 mill(not
loaded records) for next run.
This job is not sequential job, it is stand alone parallel
job.What are the possibilities available in datastage8.1?

Answer

in target rdbms we can select insert rows which does not
exist

Question { 8918 }

if a column contains data like
ram,rakesh,madhan,suraj,pradeep,bhaskar then I want to
place names separated by commas in another columns how can
we do?

Answer

seq file ------> Transformer -------> target

1.extract the source data into seq file.
2.In transformer source column to target , and apply the field function
Field(column name, ',' , 1)
next same drag the source column to target , and apply the field function
Field(column name,',',2)
.
.
.
Field(column name,',',5)

Question { FIS, 8995 }

HOw Hash Partion Works

Thank you in Advance

i have doubts on Hash Partion TEch Could please give me the
clear understandable notation

example

e_id,dept_no
1,10
2,10
3,20
4,20
5,30
6,40

i have TWo Nodes/Three Nodes

My questions are:

1).if i select hash key as e_id how Hash partion will
distribute the data in to two NOdes/three NOdes
2).if i select hash key as dept_no how Hash partion will
distribute the data in to two NOdes/three NOdes


sivakumar.katta7@gmail.com

Answer

Consider you r having two nodes node 1 and node and u
selected e_id as hash key then
for two nodes for three nodes
node 1 node 2 node 1 node 2 node 3
1,10 2,10 1,10 2,10 3,20
3,20 4,20 4,20 5,30 6,40
5,30 6,40

if u selected dept_no as hash id then
for two node for three node
node 1 node 2 node1 node2 node3
1,10 3,20 1,10 3,20 5,30
2,10 4,20 2,10 4,20
5,30 6,40 6,40

Question { FIS, 8995 }

HOw Hash Partion Works

Thank you in Advance

i have doubts on Hash Partion TEch Could please give me the
clear understandable notation

example

e_id,dept_no
1,10
2,10
3,20
4,20
5,30
6,40

i have TWo Nodes/Three Nodes

My questions are:

1).if i select hash key as e_id how Hash partion will
distribute the data in to two NOdes/three NOdes
2).if i select hash key as dept_no how Hash partion will
distribute the data in to two NOdes/three NOdes


sivakumar.katta7@gmail.com

Answer

i don't know y some one ticked my ans as wrong, please give me explanation, n correct ans if i'm not correct. don't tick blindly as no.

Harikrishna, ur ans is correct if it is 4 node configuration and dept_no is key column, read the question properly he asked (1) 2 or 3 node and key column as e_id
(2) 2 or 3 node and key column is dept_id

Question { MGL, 6788 }

while we using change capture stage we have to be take two
table thats are 1.before table 2. after table .
what is before table and after table
please give me clear notation
Thank You very much in advance

Answer

The Change Capture stage takes two input data sets, denoted before and after, and outputs a single data set whose records represent the changes made to the before data set to obtain the after data set. The stage produces a change data set, whose table definition is transferred from the after data set’s table definition with the addition of one column: a change code with values encoding the four actions: insert, delete, copy, and edit. The preserve-partitioning flag is set on the change data set.

Copy code:
Allows you to specify an alternative value for the code that indicates the after record is a copy of the before record. By default this code is 0.

Deleted code:
Allows you to specify an alternative value for the code that indicates that a record in the before set has been deleted from the after set. By default this code is 2.

Edit code:
Allows you to specify an alternative value for the code that indicates the after record is an edited version of the before record. By default this code is 3.

Insert Code:
Allows you to specify an alternative value for the code that indicates a new record has been inserted in the after set that did not exist in the before set. By default this code is 1.

Question { 6579 }

i hav source like this .
deptno,sal
1,2000
2,3000
3,4000
1,2300
4,5000
5,1100
i want target like this
target1
1,2000
3,4000
4,5000
target2
2,3000
1,2300
5,1100 with out using transformer

Answer

____tgt1
|
|
source------transformer---
|
|
-----tgt2


in transformer

TGT1 ---
constraint --> mod(deptno,2) = 1
source.deptno - deptno
source.sal - sal

TGT2 ---
constraint --> mod(deptno,2) = 0
derivation -->
source.deptno - deptno
source.sal - sal

u'll get the ans, if i'm wrong plz correct me