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Concatenate

Concatenate is a script load prefix that enables a dataset to be appended to an already existing in-memory table. It is often used to append different sets of transactional data to a single central fact table, or to build up common reference datasets of a specific type that originate from multiple sources. It is similar in functionality to a SQL UNION operator.

The resulting table from a concatenate operation will contain the original dataset with the new rows of data appended to the bottom of that table. The source and target tables may have different fields present. Where fields are different, the resulting table will be widened to represent the combined result of all fields present in both the source table and the target table.

Syntax:  

Concatenate[ (tablename ) ] ( loadstatement | selectstatement )

Arguments
Argument Description
tablename The name of an existing table. The named table will be the target of the Concatenate operation and any records of data loaded will be appended to that table. If the tablename parameter isn't used, the target table will be the last loaded table before this statement.
loadstatement/selectstatement The loadstatement/selectstatement argument that follows the tablename argument will be concatenated to the specified table.

Regional settings

Unless otherwise specified, the examples in this topic use the following date format: MM/DD/YYYY. The date format is specified in the SET DateFormat statement in your data load script. The default date formatting may be different in your system, due to your regional settings and other factors. You can change the formats in the examples below to suit your requirements. Or you can change the formats in your load script to match these examples. For more information, see Modifying app regional settings.

Default regional settings in apps are based on a combination of identity provider settings, system settings, or browser settings. These regional format settings are not related to the language displayed in the Qlik Cloud user interface. Qlik Cloud will be displayed in the same language as the browser you are using.

If you are an app creator, you can set the default region for apps you create. For more information, see Setting your preferred regional settings for creating apps.

Function example
Example Result
Concatenate(Transactions) Load …. ; The data loaded in the load statement below the Concatenate prefix will be appended to the existing in-memory table named Transactions (assuming that a table named Transactions has been loaded prior to this point in the load script).

Example 1 – Appending multiple sets of data to a target table with Concatenate load prefix

Example 2 – Appending multiple sets of data to a target table using implicit concatenation