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                            ```
select group_concat(author_id) from yjf_user_mj_author_collect
```
group_concat 是自動按逗號拼接返回
![](https://img.kancloud.cn/d8/64/d864b3a09c92bee4019a270da5934d04_378x316.png)

 ![](https://img.kancloud.cn/a7/d4/a7d4ccd122842fd368a45fa9627fb953_581x260.png)


查詢一個字段
![](https://img.kancloud.cn/6d/50/6d5075494508df47009446a183cf4a26_145x93.png)
```

SELECT * FROM `user01` where FIND_IN_SET(4,`name`);

```
結果
![](https://img.kancloud.cn/54/71/54713f697f5000711fead6bdbf83de2f_136x71.png)

                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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