postgres groupby 合并字符串

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       SELECT company_id
       
       , string_agg
       
       (employee
       
       , 
       
       ', '
       
       )
       
       

       
       FROM mytable
       
       

       
       GROUP 
       
       BY company_id
       
       ;
      
      
      
      

       
       
1.
       
       
2.
       
       
3.
      
      

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懂得,原来世界如此简单!