docs/sql-manual/sql-functions/string-functions/regexp/regexp.md

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

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## regexp
### description
#### syntax

`BOOLEAN regexp(VARCHAR str, VARCHAR pattern)`

Perform regular matching on the string str, return true if it matches, and return false if it doesn't match. pattern is a regular expression.

Character set matching requires the use of Unicode standard character classes. For example, to match Chinese, use `\p{Han}`.

### example

```sql
--- Find all data starting with 'billie' in the k1 field
mysql> select k1 from test where k1 regexp '^billie';
+--------------------+
| k1                 |
+--------------------+
| billie eillish     |
+--------------------+

--- Find all data ending with 'ok' in the k1 field:
mysql> select k1 from test where k1 regexp 'ok$';
+----------+
| k1       |
+----------+
| It's ok  |
+----------+

mysql> select regexp('这是一段中文This is a passage in English 1234567', '\\p{Han}');
+-----------------------------------------------------------------------------+
| ('这是一段中文This is a passage in English 1234567' regexp '\p{Han}')       |
+-----------------------------------------------------------------------------+
|                                                                           1 |
+-----------------------------------------------------------------------------+
```

### keywords
    REGEXP