-
What is granularity in INFORMATICA? How should be the level of granularity for a fact table as well as for a dimension table?
P.Sivakumar
- Sep 12th, 2007
Granularity is a lowest level of information stored in databse that is called as granularity.
-
What is staging are why we need it
Mahendra Rajpoot
- Sep 17th, 2014
Staging area may be required if you have any of the following scenarios: Delta Loading: Your data is read incrementally from the source and you need an intermediate storage where incremental set of y...
MAHESH MANAM
- Aug 16th, 2012
It is a automated process of building a data warehouse which involves taking the data from disparate source systems, converting them into a consistent form that can be loaded into the warehouse and pe...
-
-
-
What are various types of Aggregation?
Various types of aggregation are SUM, AVG, COUNT, MAX, MIN, FIRST, LAST, MEDIAN, PERCENTILE, STDDEV, and VARIANCE.
Read Best Answer
sithusithu
- Jan 19th, 2006
AVG COUNT FIRST LAST MAX MEDIAN MIN PERCENTILE STDDEV SUM VARIANCECheers,Sithu
-
What is Load Manager?
Read Best Answer
Editorial / Best Answer
Answered by: Deb
- Jun 8th, 2005
I am providing the answer which I have taken it from Informatica 7.1.1 manual,
Ans: While running a Workflow,the PowerCenter Server uses the Load Manager process and the Data Transformation Manager Process (DTM) to run the workflow and carry out workflow tasks.When the PowerCenter Server runs a workflow, the Load Manager performs the following tasks:
1. Locks the workflow and reads workflow properties.
2. Reads the parameter file and expands workflow variables.
3. Creates the workflow log file.
4. Runs workflow tasks.
5. Distributes sessions to worker servers.
6. Starts the DTM to run sessions.
7. Runs sessions from master servers.
8. Sends post-session email if the DTM terminates abnormally.
When the PowerCenter Server runs a session, the DTM performs the following tasks:
1. Fetches session and mapping metadata from the repository.
2. Creates and expands session variables.
3. Creates the session log file.
4. Validates session code pages if data code page validation is enabled. Checks query
conversions if data code page validation is disabled.
5. Verifies connection object permissions.
6. Runs pre-session shell commands.
7. Runs pre-session stored procedures and SQL.
8. Creates and runs mapping, reader, writer, and transformation threads to extract,transform, and load data.
9. Runs post-session stored procedures and SQL.
10. Runs post-session shell commands.
11. Sends post-session email.raju4dw
- Aug 6th, 2010
Load Manager is responsible for dispatching the sessions and maintains Q of sessions based on first in and first out. Load Manager is also known as Master Processor (DTM) Data Transformation Manager.D...
Deb
- Jun 8th, 2005
I am providing the answer which I have taken it from Informatica 7.1.1 manual, Ans: While running a Workflow,the PowerCenter Server uses the Load Manager process and the Data Transformation...
-
How many ways you can update a relational source definition ?
Two ways 1. Edit the definition 2. Reimport the defintion
Read Best Answer
Editorial / Best Answer
Sumithav29- Member Since Jun-2009 | Jun 12th, 2009
1. If you want to make minor changes to the source definition, you can edit the source definition (in source analyzer) then the Designer propagates the changes to all mappings using that source.
2. If the source changes are significant, re-import the source and giving replace option while re-importing will reflect the changes in all the mappings where the source is used.Sumithav29
- Jun 12th, 2009
1. If you want to make minor changes to the source definition, you can edit the source definition (in source analyzer) then the Designer propagates the changes to all mappings using that source.2. If ...
gazulas
- Jan 30th, 2006
in 2 ways we can do it 1) by reimport the source definition 2) by edit the source definition
-
Which transformation you need while using the COBOL sources as source definitions?
Read Best Answer
Editorial / Best Answer
sithusithu- Member Since Dec-2005 | Jan 20th, 2006
Normalizer transformation.
Normalizer transformation which is used to normalize the data.Since COBOL sources are often consists of De-normalized data.sithusithu
- Jan 20th, 2006
Normalizer transformation. Normalizer transformation which is used to normalize the data.Since COBOL sources are often consists of De-normalized data.
-
What is Join index
Hi everyone ,Can u explain in detail what is a join index,with example.And what is its importance in teradata.
Read Best Answer
Editorial / Best Answer
rin23- Member Since May-2011 | May 12th, 2011
A join Index is a cross between a view and an index. It is like a view in that it is created using a query to specify the structure, composition and source of the contents. It is like an index in the way that it is used automatically by the database system to improve the performance of a query. Join indexes use the "classic" space-time trade off trading disk space for storage of the join index to get improved performance for queries. Unlike many other materialized view implementations, Teradata join indexes are updated immediately and automatically when changes are made to the base tables. There is never a concern that you might be using stale data when the system chooses to use a join index in the query plan. Also, Teradata uses its sophisticated coverage testing algorithm to minimize the cost associated with join index maintenance.?
rin23
- May 12th, 2011
A join Index is a cross between a view and an index. It is like a view in that it is created using a query to specify the structure, composition and source of the contents. It is like an index in the ...
-
Informatica
I have 2 sources one is relational table with 7 ports
second is flat file with 8 ports.How can I get the combined output and I should not do any modifications to the source structure?priyank_divya
- Aug 3rd, 2012
Hi, I think we can obtain the results by using Joiner transformation. If the sources have no common columns, we can add one extra column with a value 1 in both the sources and then can join based on ...
-
How to explain sales project in interview.
How to explain sales project in interview.could u tell me modules or dim table with some column names and facts how to move data from dim to facts.and give me what logic u implement in that projects
Lokesh M
- Jan 3rd, 2013
For explaining your sales project: You can follow these points and cover them based on your actual project. 1. Name of the Project 2. Name of the Client 3. Brief Description of the Client 4. Brief ...
Informatica Interview Questions
Read Best Answer
Ans