What is loosely coupled tables in QlikView?
A loosely coupled table is a table that doesn’t propagate incoming associations to other tables that are linked to the current loosely coupled table. Your selections that arrive in this table through associations will stop there and then.
What is circular loop QlikView?
Circular Loop (circular references): If there are circular references (“loops”) in a data structure, the tables are associated in such a way that there is more than one path of associations between two fields. QlikView solves the problem of circular references by breaking the loop with a loosely coupled table.
What is QlikView by default when it detects circular loops?
When a data with QlikView circular reference is viewed in a table, it gives incorrect and errored information. However, QlikView software detects the presence of a circular reference during script execution and prevents the original data from being corrupt.
How do you avoid circular references in qlik sense?
Qlik Sense solves the problem of circular references by breaking the loop with a loosely coupled table. When Qlik Sense finds circular data structures while executing the load script, a warning dialog will be shown and one or more tables will be set as loosely coupled.
What is concatenate in QlikView?
Concatenation feature in QlikView is used to append the rows from one table to another. It happens even when the tables have different number of columns. It differs from both Join and Keep command, as it does not merge the matching rows from two tables into one row.
What is link table in QlikView?
The link table. A link table is used to associate multiple fact tables within a Qlik data model without creating synthetic keys or circular reference (an alternative is the concatenated fact table).
What is mapping load QlikView?
The Mapping Load statement is used to load fields and values into a freshly created mapping table in QlikView. Typically, a mapping table has two columns, first containing values for comparison (as a reference point) and second containing the resultant or desired values based on the comparison.
What is set analysis in QlikView?
Set analysis offers a way of defining a set (or group) of data values that is different from the normal set defined by the current selections. Normally, when you make a selection, aggregation functions, such as Sum, Max, Min, Avg, and Count aggregate over the selections that you have made: the current selections.
What is circular loop and how do you avoid it in QlikView?
If there are circular references (“loops”) in a data structure, the tables are associated in such a way that there is more than one path of associations between two fields. This type of data structure should be avoided as much as possible, since it might lead to ambiguities in the interpretation of data.
What is match function in QlikView?
The Match() function in QlikView is used to match the value of a string on expression with data value present in a column. It is useful to fetch rows containing specific strings and it also has an extension in form of wildmatch() function.
What is mapping table in QlikView?
Mapping table is a table, which is created to map the column values between two tables. It is also called a Lookup table, which is only used to look for a related value from some other table.
What does loosely coupled table mean In QlikView?
A QlikView loosely coupled table is a table which does not follow the logical structure of data properly. QlikView automatically creates one or more tables as loosely-coupled to cut the logical association between tables forming a circular loop.
How is a link table used in Qlik?
A link table is used to associate multiple fact tables within a Qlik data model without creating synthetic keys or circular reference (an alternative is the concatenated fact table). Without going into too much detail, the steps to create a link table are: Create a compound link key based on the common dimension keys between the fact tables;
When do circular references occur in QlikView data analysis?
QlikView Circular References can encounter during the time of data analysis. This occurrence resembles in some ways with that of synthetic key’s scenario. Although the cause and cure to a circular reference are different from that of a synthetic key. So, let’s start QlikView Circular Reference Tutorial. Join DataFlair on Telegram!! 2.