oracle 行转列-白红宇

oracle 行转列

阅读量：792 次

发布时间：2023-02-24

本文共 700 字，大约阅读时间需要 2 分钟。


   
 
   
 
   
  
     
    
  
      
     
  
     SELECT deptno, wm_concat(ename) FROM emp GROUP BY deptno;
  
     
  
    
  
    
  
     
  
    
  
   
  
   
  ?????????????????
  
   
  ?????????????? GROUP BY ? wm_concat ?????????????????????????? SQL ???
  
   
  
     
    
  
    SELECT deptno, wm_concat(ename) FROM emp GROUP BY deptno;
  
    
  
   
  ?????????????????? GROUP BY deptno ???????????????????????????????
  
   
  ?????????
  ?????????????????????????????????????????????????????????
  
   
  ????????
  ? emp ???? deptno ????????????????????????????????????
  
   
  ?????? wm_concat ??
  ?? wm_concat ?????????????????? empno ?????????????????????????????
  
   
  ?????????????????????????????????????????
  
   
  ??????????????????????????????????????

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