Saturday, 14 February 2015

QlikView Join Related Interview Questions Answers Example

Hey this time we come with new BI tool which is knows as QlikView, QlikView becoming famous day by day among Business inelegance client/developers, So this is neutral that job must be available there for BI developer, and this is seen that many other tools users(experienced developers) now making career in this tool. So here are interview questions with answers which is very useful.
This set Contain QlikView join related interview questions with answers.

QlikView Join Related Interview Questions and Answers

Q-1). Define Join and its Types?
Ans: Join is used to transform the given data and whenever we are using joins to transform the data it is called Data Merging. Join will have different types as mentioned below:
Left Join, Right Join, Inner Join and Join.

Q-2). What is Left Join?
Ans: The join and keep prefixes in the QlikView script language can be preceded by the prefix left.
If used before join, it specifies that the join between the two tables should be a left join. The resulting table only contains combinations between the two tables with a full data set from the first table. If used before keep, it specifies that the second table should be reduced to its Common intersection with the first table before being stored in QlikView.

Q-3). What is Right Join?
Ans: The join and keep prefixes in the QlikView script language can be preceded by the prefix right. If used before join, it specifies that the join between the two tables should be a right join. The resulting table only contains combinations between the two Tables with a full data set from the second table. If used before keep, it specifies that the first table should be reduced to its Common intersection with the second table before being stored in QlikView.

Q-4). What is Inner Join?
Ans: The join and keep prefixes in the QlikView script language can be preceded by the prefix inner. If used before join, it specifies that the join between the two tables should be an inner join. The resulting table contains only combinations between the two tables with a full data set from both sides. If used before keep, it specifies that the two tables should be reduced to their common intersection before being stored in QlikView.

Q-5). How does Join Works?
Ans: An operation that uses two tables and combines them into one. The records of the table produced are combinations of records in the two original tables, usually such that the two records contributing to any given combination in the produced table have a common value for one or several common fields, a so called natural join. In QlikView, joins can be made in the script, producing logical tables. Inner join, Left join, Right join and Outer join are all possible operations
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