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Data Warehouse Interview Questions
Questions Answers Views Company eMail

how will u load the data to diminision tables and fact tables,what is the hiraraichy why we are using hirarichy

TCS,

2 7270

suppose in my source flatfile i have 10000 records in that some of master table records missed table records missed then what will u do

Patni,

2135

how will u take the data from clint server and next what u do in datamodeling what u will u do in staging area what u will u do next what u are doing please give the step by step by process

Patni,

2173

in staging we are merging the data and remove the inconsistants data that type of situation what u will done and type of functions u can use

TCS,

2042

write a sql query following table some duplicate present 1 1 2 2 3 3 4 5 i want the output unique one column duplicate another column following format like unique duplicate 1 1 2 2 3 3 4 5

TCS,

2 6132

write sql query to filter the null value data following table? name age john 30 smith null null 34 sharp 24 i want the output following are name age john 30 sharp 24

HP,

2 6155

write a query to remove null value follwing table? col1 col2 col3 dinesh null null null suresh null null null prakesh i want the output col1 col2 col3 dinesh suresh prakesh

Accenture, TCS,

4 9842

write sql query to remove null value following table id name 101 dinesh null jyothi null bharathi 102 suresh null shilpha 103 prakesh null suma i want the output id name 101 dinesh 102 suresh 103 prakesh

Accenture,

5 11635

how to find the 5th highest salary form each department using 1.SQL Query 2. Informatica power center designer?

CTC,

4 26110

SEQUENTIAL FILE I HAVE ONE RECORD,I WANT 100 RECORDS IN TARGET?HOW CAN WE DO THAT?PLS EXPLAIN ME AND WHAT STAGES ARE THERE?WHAT LOGIC?

TCS,

1 6627

What is configuration your file structure 2)I have two databases both are Oracle while loading data from source to target the job takes 30 min but I want to load less time how?

Hexaware,

1 6359

In datastage can ve find the job based on source table name ??

TCS,

1 9469

write asql query to filter improper date format? date 20-apr 11-mar-2010 30-may-2010 feb-2009 i want the output date 11-mar-2010 30-may-2010

Accenture,

2 6764

write a sql query following table? col1 col2 1 2 1 2 1 2 3 4 3 4 5 6 i want the output like unique duplicate col1 col2 col1 col2 1 2 1 2 3 4 1 2 5 6

Cap Gemini,

1 3488

wtite sql query following table are city gender no chennai male 40 chennai female 35 bangalore male 10 bangalore female 25 mumbai female 15 i want the output? city male female chennai 40 35 bangalore 10 25 mumbai null 15

Bank Of America,

3 7607


Un-Answered Questions { Data Warehouse }

hi this is bhaskar iam working in Tcs u want any real time faqs send me your qs i will ans that qs ok this is my id bhaskarparitala.rao@gmail.com

2141


What is Ad-Hoc access? What is the difference between Managed Query and Ad-Hoc access?

2980


How does proc sql work?

1106


Then how to select the source by using webi or deski reports into crystal reports? i think main source is Businessview. where u import the datasource ?

2072


what do you mean by data staging area? : Sas-di

1158


Explain the new features of teradata?

1055


How a routine is called in datastage job?

1136


What is what are semi-additive and factless facts and in which scenario will you use such kinds of fact tables?

1054


wat are deployement groups in informatica, how it will be used for developers

1733


How to limit decimal places for variable using proc means?

1122


What are the advantages of shortcuts?

975


What’s the difference between var b1 – b3 and var b1 — b3?

1373


how to do aggregation (year wise quantity ) using only source qualifier, the source is sql server date as datetime data type and target as flat file with year (string datatype)

2709


whats the logic to load the lower level of granularity of data to fact table.

2285


What are the new features of informatica 9.x at the developer level?

1055