Guides
Describing a Query
In order to view the schema of the result of a query, prepend `DESCRIBE` to a query.  
```sql
DESCRIBE SELECT * FROM tbl;
```  
<div class="narrow_table"></div>  
| column_name | column_type | null | key  | default | extra |
|-------------|-------------|------|------|---------|-------|
| i           | INTEGER     | YES  | NULL | NULL    | NULL  |
| j           | VARCHAR     | YES  | NULL | NULL    | NULL  |  
Note that there are subtle differences: compared to the result when [describing a table](#::describing-a-table), nullability (` null`) and key information (` key`) are lost.