chore: remove database column

Author: tianzhou

docs/components/prompts.mdx

@@ -6,10 +6,10 @@ MCP Prompts provide AI-assisted capabilities for database operations. These prom
 
 ## Supported Prompts
 
-| Prompt              | Command Name   | PostgreSQL | MySQL | MariaDB | SQL Server | SQLite |
-| ------------------- | -------------- | :--------: | :---: | :-----: | :--------: | ------ |
-| Generate SQL        | `generate_sql` |     ✅     |  ✅   |   ✅    |     ✅     | ✅     |
-| Explain DB Elements | `explain_db`   |     ✅     |  ✅   |   ✅    |     ✅     | ✅     |
+| Prompt              | Command Name   | 
+| ------------------- | -------------- | 
+| Generate SQL        | `generate_sql` | 
+| Explain DB Elements | `explain_db`   |
 
 ## Generate SQL
 

docs/components/tools.mdx

@@ -6,9 +6,9 @@ MCP Tools enable executable operations on the database. DBHub provides SQL execu
 
 ## Supported Tools
 
-| Tool        | Command Name  | Description                                                         | PostgreSQL | MySQL | MariaDB | SQL Server | SQLite |
-| ----------- | ------------- | ------------------------------------------------------------------- | :--------: | :---: | :-----: | :--------: | ------ |
-| Execute SQL | `execute_sql` | Execute single or multiple SQL statements (separated by semicolons) |     ✅     |  ✅   |   ✅    |     ✅     | ✅     |
+| Tool        | Command Name  | Description                                                         | 
+| ----------- | ------------- | ------------------------------------------------------------------- |
+| Execute SQL | `execute_sql` | Execute single or multiple SQL statements (separated by semicolons) |
 
 ## Execute SQL