show databases;

+-----------------------+
| Schemas               |
+-----------------------+
| greptime_private      |
| illegal-database      |
| information_schema    |
| public                |
| test_public_schema    |
| upper_case_table_name |
+-----------------------+

use information_schema;

Affected Rows: 0

show tables;

+-------------------+
| Tables            |
+-------------------+
| build_info        |
| column_privileges |
| column_statistics |
| columns           |
| engines           |
| tables            |
+-------------------+