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

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# lower
## description
### Syntax

`INT lower(VARCHAR str)`


将参数中所有的字符串都转换成小写

## example

```
mysql> SELECT lower("AbC123");
+-----------------+
| lower('AbC123') |
+-----------------+
| abc123          |
+-----------------+
```
## keyword
LOWER