The Query API allows you to retrieve data from mobile business objects, to page data, and to retrieve a query result by filtering. You can also use the Query API to filter children MBOs of a parent MBO in a one to many relationship.
Retrieving Data from Mobile Business Objects
You can retrieve data from mobile business objects through a variety of queries, including object queries, arbitrary find, and through filtering query result sets.
Retrieving Relationship Data
A relationship between two MBOs allows the parent MBO to access the associated MBO. A bidirectional relationship also allows the child MBO to access the associated parent MBO.