SQL SERVER 2008的Grouping sets的用法

最新推荐文章于 2025-03-31 10:17:57 发布

转载最新推荐文章于 2025-03-31 10:17:57 发布 · 134 阅读

本文深入探讨了SQL中的SUM、GROUP BY与WITH ROLLUP/CUBE用法，通过具体实例展示了如何进行聚合计算与分组操作，旨在帮助读者掌握高级SQL查询技巧。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

CREATE TABLE Sales (EmpId INT, Yr INT, Sales MONEY)

INSERT Sales VALUES(1, 2005, 12000)

INSERT Sales VALUES(1, 2006, 18000)

INSERT Sales VALUES(1, 2007, 25000)

INSERT Sales VALUES(2, 2005, 15000)

INSERT Sales VALUES(2, 2006, 6000)

INSERT Sales VALUES(3, 2006, 20000)

INSERT Sales VALUES(3, 2007, 24000)

SELECT EmpId, Yr, SUM(Sales) AS Sales FROM Sales GROUP BY EmpId, Yr WITH ROLLUP

SELECT EmpId, Yr, SUM(Sales) AS Sales FROM Sales GROUP BY EmpId, Yr WITH CUBE

SELECT EmpId, Yr, SUM(Sales) AS Sales FROM Sales GROUP BY GROUPING SETS((EmpId, Yr), (EmpId), ())

EmpId       Yr          Sales
----------- ----------- ---------------------
1           2005        12000.00
1           2006        18000.00
1           2007        25000.00
1           NULL        55000.00
2           2005        15000.00
2           2006        6000.00
2           NULL        21000.00
3           2006        20000.00
3           2007        24000.00
3           NULL        44000.00
NULL        NULL        120000.00

SELECT EmpId, Yr, SUM(Sales) AS Sales FROM Sales GROUP BY GROUPING SETS((EmpId, Yr), (EmpId), (Yr), ())

EmpId       Yr          Sales
----------- ----------- ---------------------
1           2005        12000.00
2           2005        15000.00
NULL        2005        27000.00
1           2006        18000.00
2           2006        6000.00
3           2006        20000.00
NULL        2006        44000.00
1           2007        25000.00
3           2007        24000.00
NULL        2007        49000.00
NULL        NULL        120000.00
1           NULL        55000.00
2           NULL        21000.00
3           NULL        44000.00

SELECT EmpId, Yr, SUM(Sales) AS Sales FROM Sales GROUP BY GROUPING SETS((EmpId, Yr), (EmpId))

EmpId       Yr          Sales
----------- ----------- ---------------------
1           2005        12000.00
1           2006        18000.00
1           2007        25000.00
1           NULL        55000.00
2           2005        15000.00
2           2006        6000.00
2           NULL        21000.00
3           2006        20000.00
3           2007        24000.00
3           NULL        44000.00

SELECT EmpId, Yr, SUM(Sales) AS Sales FROM Sales GROUP BY GROUPING SETS((EmpId, Yr), ())

EmpId       Yr          Sales
----------- ----------- ---------------------
1           2005        12000.00
1           2006        18000.00
1           2007        25000.00
2           2005        15000.00
2           2006        6000.00
3           2006        20000.00
3           2007        24000.00
NULL        NULL        120000.00

SELECT EmpId, Yr, SUM(Sales) AS Sales FROM Sales GROUP BY GROUPING SETS((EmpId), (Yr))

EmpId       Yr          Sales
----------- ----------- ---------------------
NULL        2005        27000.00
NULL        2006        44000.00
NULL        2007        49000.00
1           NULL        55000.00
2           NULL        21000.00
3           NULL        44000.00

SELECT EmpId, Yr, SUM(Sales) AS Sales FROM Sales GROUP BY GROUPING SETS((EmpId, Yr))

EmpId       Yr          Sales
----------- ----------- ---------------------
1           2005        12000.00
2           2005        15000.00
1           2006        18000.00
2           2006        6000.00
3           2006        20000.00
1           2007        25000.00
3           2007        24000.00