oracle 9i 中行转列

示例如下：

 SELECT deptno
          , LTRIM(MAX(SYS_CONNECT_BY_PATH(ename,','))
             KEEP (DENSE_RANK LAST ORDER BY curr),',') AS concatenated
      FROM   ( SELECT deptno
                    , ename
                    , ROW_NUMBER() OVER (PARTITION BY deptno ORDER BY ename) AS curr
                    , ROW_NUMBER() OVER (PARTITION BY deptno ORDER BY ename) -1 AS prev
               FROM   emp )
      GROUP BY deptno
     CONNECT BY prev = PRIOR curr AND deptno = PRIOR deptno
      START WITH curr = 1;  

　　

显示如下：

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