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4 changes: 2 additions & 2 deletions docs/database/sql/sql-syntax-summary.md
Original file line number Diff line number Diff line change
Expand Up @@ -555,13 +555,13 @@ SELECT column_name(s) FROM table2;
| -------------------- | ---------------------- |
| `LEFT()`、`RIGHT()` | 左边或者右边的字符 |
| `LOWER()`、`UPPER()` | 转换为小写或者大写 |
| `LTRIM()`、`RTIM()` | 去除左边或者右边的空格 |
| `LTRIM()`、`RTRIM()` | 去除左边或者右边的空格 |
| `LENGTH()` | 长度 |
| `SOUNDEX()` | 转换为语音值 |

其中, **`SOUNDEX()`** 可以将一个字符串转换为描述其语音表示的字母数字模式。

```scss
```sql
SELECT *
FROM mytable
WHERE SOUNDEX(col1) = SOUNDEX('apple')
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