what is the meant by Normalization and de-normalization?
Answers were Sorted based on User's Feedback
Answer / gireesh
Normalization is a process in database design which groups
data into various tables which are then crosslinked by a
particular field. In a properly normalized database, there
will be only one field in one table for a particular piece
of data, eliminating possibility for conflicts. Breaking the
database up into numerous smaller tables, and eliminating
redundancies, eases management and enhances efficiency.
| Is This Answer Correct ? | 24 Yes | 5 No |
Answer / srinivas
Normalization:
Normalization is a technique to reduce redundant, and
inconscistent data. normally normalization techniques use
in snoflake schema.
De-normalization:
it is a technique to move high to low normal forms in
datamodeling to increase the performance of databases.
| Is This Answer Correct ? | 3 Yes | 0 No |
IN Informatica, I have 10 records in my source system. I need to load 2 records to target for each run. how to perform.please let me know. I know by using Mapping variable we can perform but how to load please any one explain.
Eliminating of duplicate records without using dynamic lookups
Explain do we need an etl tool?
explain the methodology of Data Warehousing?(Polaries)
Explain and compare etl & manual development?
how can i text accracy of ETL migration? i am very new to data warehousing. we are writing ETL scripts using SCRIPELLA tool. how can i test the correctness of data. and we are generating reports using pentaho . is there any easy way to test the pentaho. how can test these ETL scripts written in scriptella? thanks in advance
When do we use dynamic cache and static cache in connected and unconnected lookup transformations? Difference between stop and abort
What are the different etl testing categories as per their function?
please tell me any easy ways of testing the Data warehouse project. In my project we are not using any tools for ETL. we are writing scripts in SCRIPTELLA. And we using Pentaho tool for Reporting How can i test all these. please tell me ASAP. thanks in adavance
what are the session parameters? How do u set them?
How to Check the source record count from traget table.
What are the different Lookup methods used in Informatica?