docs/sql-manual/sql-functions/string-functions/top-level-domain.md

---
{
    "title": "TOP_LEVEL_DOMAIN",
    "language": "en"
}
---

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## Description

## Syntax

`VARCHAR  top_level_domain(VARCHAR url)`


Extract the top-level domain from a URL and return it. If the URL is invalid, return an empty string.

## Example

```sql
mysql [(none)]>select top_level_domain("www.baidu.com");
+-----------------------------------+
| top_level_domain('www.baidu.com') |
+-----------------------------------+
| com                               |
+-----------------------------------+

mysql [(none)]>select top_level_domain("www.google.com.cn");
+---------------------------------------+
| top_level_domain('www.google.com.cn') |
+---------------------------------------+
| cn                                    |
+---------------------------------------+

mysql [(none)]>select top_level_domain("wwwwwwww");
+------------------------------+
| top_level_domain('wwwwwwww') |
+------------------------------+
|                              |
+------------------------------+
```

### keywords

top_level_domain