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Data Warehouse Interview Questions
Questions Answers Views Company eMail

What is a three-tier data warehouse?

1120

Difference between stored procedure and macro?

1174

What is multi insert?

1058

Different phases of multiload?

1024

What is the maximum number of dml can be coded in a multiload script?

1110

Did you write stored procedures in teradata?

1137

What is inner join and outer join?

1117

How to view every column and the columns contained in indexes in teradata?

1057

Is it necessary to add? Quit statement after a bteq query when I am calling it in a unix environment?

1244

What is the use of having index's on table?

1 2462

Difference between inner join and outer join?

1039

What are the functions of a teradata dba?

1079

What are the various reporting tools in the market?

1074

How to identify ppi columns?

1184

What is spool space and when running a job if it reaches the maximum spool space how you solve the problem?

1111


Un-Answered Questions { Data Warehouse }

What do you mean by the overflow errors?

1373


Is it possible to query a hash file?

2013


Why is dimensional normalization not required?

1096


Explain fact table?

1058


How do u convert the columns to rows in datastage?

1197


How many bi services node can be clustered together?

877


data data1; input dt account; format dt date9.; cards; 1745 1230 1756 1120 1788 1130 1767 1240 ; data data2; input startdt enddt total; format startdt date9. enddt date9.; cards; 1657 1834 12300 1557 1758 16800 1789 1789 12300 1788 1345 12383 1899 1899 13250 ; proc sql; create table data3 as select * from data1 as x left join data2 as y on x.dt>=y.startdt and x.dt<=y.enddt; quit; Here, we are getting cartision product. But,I want left join report consisting of this program. It should not get duplicate values. you can modify the program also.

2207


what are the difficult problem are you involved in cognos report net and 8 and impromptu if any pls share with us

2953


What is the use of dimensional modeling in data warehousing?

988


what is the project environment(for each project the environment is same or different to different project)?

2229


Explain what are the advantages and disadvantages of reporting directly against the database?

1003


Give some information on report bursting?

996


Why can't we connect source qualifier and aggrigator transformation to an expression ? Why they resticted to conncet 2 active trasformations to an passive transformation ?

2187


Hi, I saw one mapping implemented by my seniors . In Expression transformation they implemented following logic. That is iif(is_date(in_UC_DATINV,'YYYYMMDD'),to_date(in_UC_DATINV,'Y YYYMMDD'),'Inventory Date is either invalid or null') Inventory_Date is validated only for is_date() But not validated for notisnull() . But error says “ either invalid or null “ why? Whether is_date() also check for not isnull() ? or in this logic something is different ? Please answer me . Advance thanks

1867


What are all the points to keep in consideration, while we are migrating the Universes,Reports from BO5.1.6 to BO 6.5? Is is compatible to migrate like this? Does it effect the filters in Reports and Join in the Universe?

2040