Oracle中使用WMSYS.WM_CONCAT 进行列转换行，并自动拼接

select  t.rank, t.Name from t_menu_item t; 

10 CLARK 
10 KING 
10 MILLER 
20 ADAMS 
20 FORD 
20 JONES 
20 SCOTT 
20 SMITH 
30 ALLEN 
30 BLAKE 
30 JAMES 
30 MARTIN 
30 TURNER 
30 WARD 

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我们通过 10g 所提供的 WMSYS.WM_CONCAT 函数即可以完成 行转列的效果 

select t.rank, WMSYS.WM_CONCAT(t.Name) TIME From t_menu_item t GROUP BY t.rank; 

DEPTNO ENAME 
------ ---------- 
10 CLARK, KING, MILLER 
20 ADAMS, FORD, JONES, SCOTT, SMITH 
30 ALLEN, BLAKE, JAMES, MARTIN, TURNER, WARD