# Advanced data modeling

This section covers advanced topics for the Semantic Layer and MetricFlow, such as data modeling workflows, and more.

[![](/img/icons/dbt-bit.svg)](./fill-nulls-advanced.md)

#### [Fill null values for metrics](./fill-nulls-advanced.md)

[Use fill\_nulls\_with to set null metric values to zero, ensuring numeric values for every data row.](./fill-nulls-advanced.md)

[![](/img/icons/dbt-bit.svg)](./ref-metrics-in-filters.md)

#### [Metrics as dimensions with metric filters](./ref-metrics-in-filters.md)

[Add metrics as dimensions to your metric filters to create more complex metrics and gain more insights.](./ref-metrics-in-filters.md)

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