SQL
`COLUMNS` Lambda Function
`COLUMNS` also supports passing in a lambda function. The lambda function will be evaluated for all columns present in the `FROM` clause, and only columns that match the lambda function will be returned. This allows the execution of arbitrary expressions in order to select and rename columns.  
```sql
SELECT COLUMNS(c -> c LIKE '%num%') FROM numbers;
```  
<div class="narrow_table"></div>  
| number |
|-------:|
| 10     |
| 20     |
| NULL   |