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Concepts → Query System Variable

About Query System Variables

Query system variables reference information to be used in a query. You use a query system variable when building a query connecting to a data source. Query system variables are available to all users that can conduct queries from data sources.

You can use query system variables to specify a window of time for incremental table loads, from a SQL data source. You can use these variables in the WHERE clause of a SQL query. Query system variables support both Query and Update Query configurations.



Available Query System Variables

The following are the available query system variables within Incorta:

VariableData TypeDescriptionExample
$$job_extract_start_timetimestampDynamically evaluates to the start time of the query execution10/3/20, 5:12:14 PM
$$job_extract_reference_timetimestampDynamically evaluates to the last successful extract time9/15/20, 8:25:12 AM
Important

To reference a query system variable, you must specify a $$ double dollar sign.

Example of Query System Variables

The following example shows how you would use query system variables in the edit query panel of a connector:

SELECT
    `ID`,
    `NAME`,
    `OWNDERID`,
    `LOCATION`,
    `CREATIONDATE`,
    `MODIFIERDATE`,
    `MODIFICATIONDATE`,
    `DESCRIPTION`,
    `PARENT`,
    `TYPE`
FROM
    `incorta`, `DATAFILE`
WHERE
    `CREATIONDATE` > $$job_extract_reference_time
    AND
    `CREATIONDATE` < $$job_extract_start_time