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

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

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## regexp_replace
### description
#### Syntax

`VARCHAR regexp_replace(VARCHAR str, VARCHAR pattern, VARCHAR repl)`

Regular matching of STR strings, replacing the part hitting pattern with repl

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

### example

```sql
mysql> SELECT regexp_replace('a b c', " ", "-");
+-----------------------------------+
| regexp_replace('a b c', ' ', '-') |
+-----------------------------------+
| a-b-c                             |
+-----------------------------------+

mysql> SELECT regexp_replace('a b c','(b)','<\\1>');
+----------------------------------------+
| regexp_replace('a b c', '(b)', '<\1>') |
+----------------------------------------+
| a <b> c                                |
+----------------------------------------+

mysql> select regexp_replace('这是一段中文This is a passage in English 1234567', '\\p{Han}+', '123');
+---------------------------------------------------------------------------------------------+
| regexp_replace('这是一段中文This is a passage in English 1234567', '\p{Han}+', '123')       |
+---------------------------------------------------------------------------------------------+
| 123This is a passage in English 1234567                                                     |
+---------------------------------------------------------------------------------------------+
```

### keywords
    REGEXP_REPLACE,REGEXP,REPLACE