N/query Module
Query.child
Property Description: A reference to children of this component. The value of this property is an object of key/value pairs. Each key is the name of a child component. Each respective value is the corresponding query.Component object. The object values are set with the execution of Query.autoJoin(options) and Component.autoJoin(options). The order of the key/value pairs reflects the parent/child hierarchy.
Type: Object
Module: N/query Module
Parent Object: query.Query
Sibling Object Members: Query Object Members
Since: 2018.1
Search NetSuite - https://system.netsuite.com/app/help/helpcenter.nl?search=Query.child

// Code Example 1

// Add additional code

//...

var myCustomerQuery = query.create({

    type: query.Type.CUSTOMER

});



var mySalesRepJoin = myCustomerQuery.autoJoin({

    fieldId: 'salesrep'

});



var myTaskJoin = myCustomerQuery.autoJoin({

    fieldId: 'task'

});



var theChild = myCustomerQuery.child;

//...

// Add additional code



//SOURCE: https://system.netsuite.com/app/help/helpcenter.nl?fid=section_1510781899.html