## Syntax
```mermaid
%%{init: {
'theme': 'base',
'flowchart': { 'padding': '7', 'nodeSpacing': '20', 'rankSpacing': '20' },
'themeVariables': {
'fontSize': '11px',
'fontFamily': 'Arial'
}
}}%%
flowchart TD
firstAggregateFunction_start((START))
firstAggregateFunction_start --> firstAggregateFunction_0_0[FIRST]:::quoted
firstAggregateFunction_0_0 --> firstAggregateFunction_0_1["("]:::quoted
firstAggregateFunction_0_1 --> firstAggregateFunction_0_2[<a href="Invantive UniversalSQL/Grammar/Expression" class="internal-link">expression</a>]
firstAggregateFunction_0_2 --> firstAggregateFunction_0_3[")"]:::quoted
firstAggregateFunction_0_3 --> firstAggregateFunction_end((END))
```
## Purpose
Group function to the first non-null value in an ordered result set.