## concat_ws，concat
### 说明
| 函数 | 说明 |
| --- | --- |
| concat_ws(sep,s1,s2...,sn) | 将s1,s2...,sn连接成字符串，并用sep字符间隔 |
| concat(s1,s2...,sn) | 连接成字符串s1,s2...,sn |
### 例子：查询宝宝月龄
```sql
SELECT
id,
longitude,
latitude,
concat_ws(',', longitude, latitude) AS location,
concat('经纬度：',longitude,',',latitude) as location1
FROM
user_address_10000
LIMIT 10;
```
