# Data Views

Data views allow you to define multiple, pre-filtered views of the same data source. This can be useful when entities exist in different states and you want a way to toggle between them.

![Data Views](/files/CYMSImodr1MteYgTAih4)

## Defining data views

Data views are defined via the [collections](/umbraco-ui-builder/13.latest/collections/overview.md) configuration.

### **AddDataView(string name, Lambda whereClauseExpression) : CollectionConfigBuilder\<TEntityType>**

Adds a data view with the given name and **where clause** filter expression. Expression must be a `boolean` expression.

```csharp
// Example
collectionConfig.AddDataView("Active", p => p.IsActive);
```

### **AddDataView(string group, string name, Lambda whereClauseExpression) : CollectionConfigBuilder\<TEntityType>**

Adds a data view with the given group, name and **where clause** filter expression. Expression must be a `boolean` expression.

```csharp
// Example
collectionConfig.AddDataView("Status", "Active", p => p.IsActive);
```


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