Example: Semantically Identical Grouping Sets Specifications and Their Resolution - Teradata Database - Teradata Vantage NewSQL Engine

The following three queries return the same results set because they are semantically identical.

     SELECT y,m,r, SUM(u)
     FROM test
     GROUP BY CUBE(y,m), CUBE(r)
     ORDER BY 1,2,3;

     SELECT y,m,r,SUM(u)
     FROM test
     GROUP BY CUBE(y,m,r)
     ORDER BY 1,2,3;

     SELECT y,m,r,SUM(u)
     FROM test
     GROUP BY GROUPING SETS(y,()), GROUPING SETS(m,()),
              GROUPING SETS(r,())
     ORDER BY 1,2,3;

The following three queries return the same results set because they are semantically identical.

     SELECT y, m, r, s, SUM(u)
     FROM test
     GROUP BY ROLLUP(y,m),ROLLUP(r,s)
     ORDER BY 1,2,3,4;

     SELECT y, m, r, s, SUM(u)
     FROM test
     GROUP BY GROUPING SETS((y, m),(),y),ROLLUP(r,s)
     ORDER BY 1,2,3,4;

     SELECT y, m, r, s, SUM(u)
     FROM test
     GROUP BY GROUPING SETS((y,m),(),y),GROUPING SETS((),r,(r,s))
     ORDER BY 1,2,3,4;