what is surrogatekey ? In ur project in which situation u
has used ? explain with example ?
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Answer / murali
the surrogate key is the primary key used to avoid the
problem of critical column. let me clarify u with example...
table A:
Cust_no(PK) Cust_name Loc
100 X Mumbai
this is what ur OLAP DHW is having abt Customer X
But, he has changed his address from X to Y. U have to
update this in ur OLAP DWH. then, i u try to insert this
into ur Table A,
Error: Prinary key Constraint violated (Coz,PK is same for
the both the records)... then, LOC is the Critical Column.
to avoid this, we need to generate a primary key either by
user defined or system generated.
| Is This Answer Correct ? | 11 Yes | 0 No |
Answer / dr.jornalist
Surrogate Key:- Surrogate key is a system generated primary
key used in informatica for maintaining history of values.
| Is This Answer Correct ? | 6 Yes | 0 No |
Answer / soujanya
surrogate key is the system generated key to avoid primary
key conatraint.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / raghureddy
It has system generated artificial primary key values .
which allows to maintian historical data in dwh
| Is This Answer Correct ? | 0 Yes | 0 No |
Suppose we have a csv file with contents as below which is used has a source file. C1,C2,C3,C4 100,200,A B,300 200,400,X,Y,299 ---> it should be 4 values but by mistake 300,600,C D,566 with a comma in between X & Y,its 5. My target takes only 4 columns, How to take care of the 2 record as above without rejecting it and loading in the target. Hope u guys have understood my scenerio
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