Answer / subhash

Normal lookup will provide data for an in-memory look up
whereas Sparse lookup will access the database directly.
Normal might provide poor performance when the reference
data is huge as it has to load large data into memory.
In such scenarios a join stage may work better(It will put
the data onto an internal dataset file for each link,
and then do the join based on the data provided). If your
stream/source data is small then a sparse lookup is
suggested
as a row is retrieved from the database for each input row
instead of the full reference data being brought into
memory.
Sparse lookup sends individual SQL statement for every
incoming row (If stream/source data is huge you can imagine
the number
of times it has to hit DB and hence the down side on
performance). It can be used when you want to get the next
sequence
number from your database (Again expensive overhead on your
job as noted before). Also note that sparse lookup is only
available for DB2 and Oracle. Normal Lookup stage can have
multiple reference link but Sparse can only have one
reference
link. When normal is used it is a good practice to choose
less volume data as reference data.

What are the different type of jobs in datastage?

0 Answers  

---

how can or from where we can get reference data in scd type2 implementation?

2 Answers   JPMorgan Chase,

---

How to create a doccument in datastage?

1 Answers   Cap Gemini,

---

What is the default padding character?

3 Answers   IBM,

---

I/P --- ID Value 1 AB 2 ABC 3 ADE 4 A O/p --- ID Value 1 A 1 B 2 A 2 B 2 C 3 A 3 D 3 E 4 A

3 Answers   IBM,

---

Input Data is: Emp_Id, EmpInd 100, 0 100, 0 100, 0 101, 1 101, 1 102, 0 102, 0 102, 1 103, 1 103, 1 I want Output 100, 0 100, 0 100, 0 101, 1 101, 1 Means Indicator should either all ZEROs or all ONEs per EmpId. Impliment this using SQL and DataStage both.

6 Answers   IBM,

---

What are the difference types of stages?

0 Answers  

---

file having these input and we have to get 3 output using same job Input 1 1 1 2 3 4 4 4 o/p1 o/p2 o/p3 1 1 2 2 1 3 3 1 4 4 4

0 Answers  

---

I/p : F1 table have A,B,C,D,E and F2 table having C,E,V i need output 0utput1: ABD output2: V any one suggest me this

0 Answers  

---

What is the process of killing a job in datastage?

0 Answers  

---

which dim, fact tables used in bank domain

1 Answers   HSBC, IBM,

---

I have 2 jobs.I want to ru job B if job A has run 3 times.How can I achieve this through datastage

3 Answers   IBM,

---