【Oracle】ROLLUP和CUBE的“小计”功能

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ROLLUP和CUBE都是“小计”功能。

配合上GROUP BY，可以进行分组小计。

配合例子进行说明：

SELECT * FROM GROUP_TEST G;

SELECT G.GROUP_ID, SUM(G.SALARY) FROM GROUP_TEST G GROUP BY G.GROUP_ID;

SELECT G.GROUP_ID, SUM(G.SALARY) FROM GROUP_TEST G GROUP BY ROLLUP(G.GROUP_ID);

SELECT G.GROUP_ID, G.JOB, SUM(G.SALARY) FROM GROUP_TEST G GROUP BY ROLLUP(G.GROUP_ID, G.JOB);

SELECT G.GROUP_ID, G.JOB, SUM(G.SALARY) FROM GROUP_TEST G GROUP BY CUBE(G.GROUP_ID, G.JOB);