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## Using Path expressions

Path expressions are used to navigate inside hierarchically structured data. Oracle NoSQL Database supports different complex data types like arrays and records. You will learn how to work with different complex data types using path expressions.

If you want to follow along with the examples, see Sample data to run queries to view a sample data and use the scripts to load sample data for testing. The scripts create the tables used in the examples and load data into the tables.

- Using Internal variables and aliases
- Working with Arrays
- Working with nested data type
- Finding the size of a complex data type