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QlikView - What is mapping load and apply map()?

asked SRVMTrainings November 19, 2014 01:24 AM  

What is mapping load and apply map()?


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answered By   0  

applymap: it is used to add the fields to our table with the help of other table . It is used as joins . The main diff between join and applymap is : If we have to add multiple fields i prefer join if we have to add one or two fields i prefer applymap

Mapping: The mapping prefix is used to create a mapping table that can be used for e.g. replacing field values and field names during the script run.

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answered By SRVMTrainings   0  
Mapping Load: The mapping prefix is used on a load or select statement to create a mapping table, these tables are different from other tables. They will be stored in separate area of memory and used as mapping tables during script execution. After execution they will automatically drop.
Ex. Mapping (Load Statement/Select Statement)
Apply Map: used for mapping data from one source to another at load time.
Ex. Applymap(‘Mapname’, expr,[default expr])
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