---
{
    "title": "left",
    "language": "zh-CN"
}
---

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# left
## description
### Syntax

`VARCHAR left(VARCHAR str)`


它返回具有指定长度的字符串的左边部分, 长度的单位为utf8字符

## example

```
mysql> select left("Hello doris",5);
+------------------------+
| left('Hello doris', 5) |
+------------------------+
| Hello                  |
+------------------------+
```
## keyword
LEFT