> For the complete documentation index, see [llms.txt](https://kythuat.dtechvn.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kythuat.dtechvn.com/effect/kiem-tra-tram.md).

# KIỂM TRA TRẠM

Kiểm tra dữ liệu trên bảng \_log: Bảng lịch sử đăng nhập

```sql
-- Some code
select max(datetime),ws 
from _log 
group by ws 
order by max(datetime),ws
```