what is sparse lookup?

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what is sparse lookup?..

Answer / ramya

use sparse lookup when reference database is huge i.e ratio
of input data and reference data is 1:100 or more

Is This Answer Correct ?

37 Yes

7 No

what is sparse lookup?..

Answer / venugopal

When the reference data is more and source data is very
very less at that time we are using the Sparce lookup i.e
the ratio is 1:100

Is This Answer Correct ?

23 Yes

5 No

what is sparse lookup?..

Answer / naresh

Sparce Lookup : if u use normal lookup it takes the entire
table into memory and perform lookup..coming to sparce
lookup it directly perform the lookup in database level.

one more difference is we can update the data into reference
tables.

Is This Answer Correct ?

12 Yes

0 No

what is sparse lookup?..

Answer / prasad

whenever the reference data is very huge than the primary
data then it will be problem for usig lookup stage,b'se the
data stored in buffer in lookup stage.using sparse lookup we
can perform the lookup in database level not in the
buffer,so the performance can be automatically improved...

Is This Answer Correct ?

5 Yes

1 No

what is sparse lookup?..

Answer / chenna

sparse lookup has more memory so that if reference table
contains huge amount of data perfer to use sparse lookup

Is This Answer Correct ?

3 Yes

4 No

what is sparse lookup?..

Answer / ananda

Join: When volume of data is more than 10 million in both
source and reference link.

Sparse Lookup: When reference data is > 500 million and
source data is <10 million.

Is This Answer Correct ?

2 Yes

8 No

what is sparse lookup?..

Answer / vin

If reference data is huge then we will go for join stage.
Then when we will use join and sparce is useful?

Is This Answer Correct ?

1 Yes

15 No

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