Drop table

One or several QlikView internal tables can be dropped from the data model, and thus from memory, at any time during script execution, by means of a drop table statement. Optionally, use the drop mapping table variant to drop mapping tables—those created with the Mapping prefix—before the end of script execution.

Syntax:  

drop [mapping] table  tablename [, tablename2 ...]

drop [mapping] tables [ tablename [, tablename2 ...]

The following items will be lost as a result of this:

• The actual table(s).
• All fields which are not part of remaining tables.
• Field values in remaining fields, which came exclusively from the dropped table(s).

Examples and results:  

drop table Orders, Salesmen, T456a;

Tab1:
Load * Inline [
Customer, Items, UnitPrice
Bob, 5, 1.50
];
 
Tab2:
LOAD Customer, Sum( Items * UnitPrice ) as Sales
resident Tab1
group by Customer;
 
drop table Tab1;

// Load mapping table of country codes:
map1:
mapping LOAD * 
Inline [
CCode, Country
Sw, Sweden
Dk, Denmark
No, Norway
] ;
// Load list of salesmen, mapping country code to country
// If the country code is not in the mapping table, put Rest of the world
Salespersons:
LOAD *, 
ApplyMap('map1', CCode,'Rest of the world') As Country 
Inline [
CCode, Salesperson 
Sw, John
Sw, Mary
Sw, Per 
Dk, Preben
Dk, Olle
No, Ole 
Sf, Risttu] ;
// We don't need the CCode anymore
Drop Field 'CCode';
									
Drop Mapping Table map1;

Metrics:

Load * Inline [
Transaction ID, Sales Amount, Sales Cost, City, Customer ID
1000012, 4509.33, 1234.22, Oslo, 250v9849
1000013, 1043.21, 180.23, Gothenburg, 195d5930
1000014, 6038.35, 1400.10, Copenhagen, 195d5930

];