Oracle Business Intelligence Application Architect
☎ +91 9994883085
Don't miss

Monday, 21 September 2015

Interview questions on aggregator transformation in informatica - Part -1

By on 09:11:00

1. What is an Aggregator Transformation?

An aggregator is an Active, Connected transformation which performs aggregate calculations like AVG, COUNT, FIRST, LAST, MAX, MEDIAN, MIN, PERCENTILE, STDDEV, SUM and VARIANCE.

2. How an Expression Transformation differs from Aggregator Transformation?

An Expression Transformation performs calculation on a row-by-row basis, whereas an Aggregator Trans-formation performs calculations on groups.

3. Does an Aggregator Transformation support only aggregate expressions?

Apart from aggregate expressions, aggregator transformation supports non-aggregate expressions and con-ditional clauses.


4. Give one example for each of Conditional Aggregation, Non-Aggregate expression and Nested Aggregation.


Use conditional clauses in the aggregate expression to reduce the number of rows used in the ag-gregation. The conditional clause can be any clause that evaluates to TRUE or FALSE.


 Use non-aggregate expressions in group by ports to modify or replace groups.

 IIF (PRODUCT = ‘Brown Bread’, ‘Bread’, PRODUCT)

Nested aggregation expression can include one aggregate function within another aggregate func-tion.



Post a Comment


1z0-482 Dumps (2) 1Z0-525 Dumps (1) BI Apps Installation (1) BI Publisher Interview Questions (1) BICS (2) Business Intelligence (1) DATA WAREHOUSE ADMINISTRATOR CONSOLE (18) Data Warehousing (48) E-BIZ R12 (1) E-BIZ R12 INSTALLATION (1) Essbase (1) hmailserver (1) Hyperion (1) Hyperion Essbase (2) Hyperion Essbase Interview Questions (1) Hyperion financial management (1) Informatica (163) Informatica Installation 9.6.1 (2) Informatica Interview Question (46) Informatica Online Training (1) Informatica Training (1) Informatica Training Chennai (1) JAVA (1) linux (1) Normalization in Oracle (1) OBIA (1) OBIA (3) OBIA Installation (33) OBIEE (1) OBIEE 10G (8) OBIEE 11G (137) OBIEE 11g dumps (2) OBIEE 11g Interview Questions (1) OBIEE 12c (20) OBIEE 12c Architecture (1) OBIEE 12C TRAINING (1) OBIEE certification (2) OBIEE Interview Question (1) OBIEE Publisher Interview Questions (1) OBIEE TRAINING CHENNAI (1) OBIEE TRAINING ONLINE (1) ODI (Oracle data integrator) (2) odi 11g certification (1) ODI dumps (2) Oracle Administrator (20) Oracle Business Intelligence Application (3) Oracle Data Integrator (2) Oracle Data Integrator Interview questions for experience (1) Oracle Database (3) Oracle Database 12c Installation steps (3) Oracle Database Installation in Linux 6 (2) Oracle E-Business R 12.3 (1) Oracle Hyperion Planning and Budgeting Questionnaire (2) oracle Joins (1) RCU INSTALLATION (1) scorecard in obiee 11g (1) SQL (3) SQL Interview Questions (1) sql server 2008 (2) Sql server installation (1) WinSCP (1)