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listagg

LISTAGG hits prime time

It’s a simple requirement. We want to transform this:


SQL> select deptno, ename
  2  from   emp
  3  order by 1,2;

    DEPTNO ENAME
---------- ----------
        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

into this: