PostgreSQL - 涉及多列时无法使用 PARTITION BY
PostgreSQL - Unable to use PARTITION BY when multiple columns are involved
假设我有一个包含 5 列的 table：
- 年
- 公司
- 部门
- 员工
- 销售额
而我想查询结果得到如下结果：
- 公司
- 部门
- 员工
- 总和（销售额）
额外的要求是首先显示具有最大销售额的公司（跨所有部门），然后公司内具有最大销售额的部门首先显示公司，对于员工列也是如此。
成功：当我仅查询公司时，以下查询工作正常：
SELECT company,
SUM(sales)
FROM company_sales
GROUP BY company
ORDER BY SUM(SUM(sales))
over (
PARTITION BY company) DESC,
company;
成功：当我按公司和部门分组时，以下查询工作正常：
SELECT company,
department,
SUM(sales)
FROM company_sales
GROUP BY company,
department
ORDER BY SUM(SUM(sales))
over (
PARTITION BY company) DESC,
SUM(SUM(sales))
over (
PARTITION BY department) DESC,
company,
department;
失败：当我按公司、部门和员工分组时，以下查询失败：
SELECT company,
department,
employee,
SUM(sales)
FROM company_sales
GROUP BY company,
department,
employee
ORDER BY SUM(SUM(sales))
over (
PARTITION BY company) DESC,
SUM(SUM(sales))
over (
PARTITION BY department) DESC,
SUM(SUM(sales))
over (
PARTITION BY employee) DESC,
company,
department,
employee;
上面的查询数据供您使用：
WITH COMPANY_SALES AS (
SELECT 2010 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-1' as employee, 100 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-2' as employee, 101 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-3' as employee, 102 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-1' as employee, 50 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-2' as employee, 51 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-3' as employee, 52 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-4' as employee, 53 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-5' as employee, 54 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-1' as employee, 80 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-2' as employee, 81 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-3' as employee, 82 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-1' as employee, 20 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-2' as employee, 21 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-3' as employee, 22 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-1' as employee, 90 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-2' as employee, 91 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-3' as employee, 92 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-4' as employee, 93 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-5' as employee, 94 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-6' as employee, 95 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-C' as department, 'Employee-B-C-1' as employee, 40 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-1' as employee, 60 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-2' as employee, 61 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-3' as employee, 62 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-4' as employee, 63 as sales
UNION SELECT 2010 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-1' as employee, 20 as sales
UNION SELECT 2010 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-2' as employee, 21 as sales
UNION SELECT 2010 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-3' as employee, 22 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-1' as employee, 30 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-2' as employee, 29 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-3' as employee, 28 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-4' as employee, 27 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-1' as employee, 45 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-2' as employee, 25 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-3' as employee, 78 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-4' as employee, 23 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-1' as employee, 12 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-2' as employee, 54 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-3' as employee, 79 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-1' as employee, 34 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-2' as employee, 89 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-3' as employee, 60 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-1' as employee, 23 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-2' as employee, 62 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-3' as employee, 45 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-4' as employee, 78 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-5' as employee, 45 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-6' as employee, 9 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-C' as department, 'Employee-B-C-1' as employee, 73 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-1' as employee, 93 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-2' as employee, 27 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-3' as employee, 59 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-4' as employee, 73 as sales
UNION SELECT 2011 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-1' as employee, 54 as sales
UNION SELECT 2011 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-2' as employee, 67 as sales
UNION SELECT 2011 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-3' as employee, 84 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-1' as employee, 78 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-2' as employee, 69 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-3' as employee, 45 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-4' as employee, 69 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-1' as employee, 24 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-2' as employee, 35 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-3' as employee, 89 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-4' as employee, 64 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-5' as employee, 75 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-1' as employee, 15 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-2' as employee, 38 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-1' as employee, 46 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-2' as employee, 85 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-3' as employee, 63 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-1' as employee, 24 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-2' as employee, 59 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-3' as employee, 76 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-4' as employee, 18 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-5' as employee, 94 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-6' as employee, 55 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-C' as department, 'Employee-B-C-1' as employee, 69 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-1' as employee, 37 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-2' as employee, 84 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-3' as employee, 52 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-4' as employee, 55 as sales
UNION SELECT 2012 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-1' as employee, 78 as sales
UNION SELECT 2012 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-2' as employee, 94 as sales
UNION SELECT 2012 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-3' as employee, 21 as sales
)
SELECT company,
department,
employee,
SUM(sales)
FROM company_sales
GROUP BY company,
department,
employee
ORDER BY SUM(SUM(sales))
over (
PARTITION BY company) DESC,
SUM(SUM(sales))
over (
PARTITION BY department) DESC,
SUM(SUM(sales))
over (
PARTITION BY employee) DESC,
company,
department,
employee;
在您的示例数据集中，部门是唯一的，因此您可以：
PARTITION BY department
但是，如果不止一家公司可以拥有同一个部门，您需要：
PARTITION BY company, department
旁注：由于您在 company, department, employee 上分组，因此第三个 over 子句是多余的。您可以通过省略它来简化：
ORDER BY SUM(SUM(sales)) over (PARTITION BY company) DESC
, SUM(SUM(sales)) over (PARTITION BY company, department) DESC
, SUM(sales) DESC
假设我有一个包含 5 列的 table：
- 年
- 公司
- 部门
- 员工
- 销售额
而我想查询结果得到如下结果：
- 公司
- 部门
- 员工
- 总和（销售额）
额外的要求是首先显示具有最大销售额的公司（跨所有部门），然后公司内具有最大销售额的部门首先显示公司，对于员工列也是如此。
成功：当我仅查询公司时，以下查询工作正常：
SELECT company,
SUM(sales)
FROM company_sales
GROUP BY company
ORDER BY SUM(SUM(sales))
over (
PARTITION BY company) DESC,
company;
成功：当我按公司和部门分组时，以下查询工作正常：
SELECT company,
department,
SUM(sales)
FROM company_sales
GROUP BY company,
department
ORDER BY SUM(SUM(sales))
over (
PARTITION BY company) DESC,
SUM(SUM(sales))
over (
PARTITION BY department) DESC,
company,
department;
失败：当我按公司、部门和员工分组时，以下查询失败：
SELECT company,
department,
employee,
SUM(sales)
FROM company_sales
GROUP BY company,
department,
employee
ORDER BY SUM(SUM(sales))
over (
PARTITION BY company) DESC,
SUM(SUM(sales))
over (
PARTITION BY department) DESC,
SUM(SUM(sales))
over (
PARTITION BY employee) DESC,
company,
department,
employee;
上面的查询数据供您使用：
WITH COMPANY_SALES AS (
SELECT 2010 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-1' as employee, 100 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-2' as employee, 101 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-3' as employee, 102 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-1' as employee, 50 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-2' as employee, 51 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-3' as employee, 52 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-4' as employee, 53 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-5' as employee, 54 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-1' as employee, 80 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-2' as employee, 81 as sales
UNION SELECT 2010 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-3' as employee, 82 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-1' as employee, 20 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-2' as employee, 21 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-3' as employee, 22 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-1' as employee, 90 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-2' as employee, 91 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-3' as employee, 92 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-4' as employee, 93 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-5' as employee, 94 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-6' as employee, 95 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-C' as department, 'Employee-B-C-1' as employee, 40 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-1' as employee, 60 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-2' as employee, 61 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-3' as employee, 62 as sales
UNION SELECT 2010 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-4' as employee, 63 as sales
UNION SELECT 2010 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-1' as employee, 20 as sales
UNION SELECT 2010 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-2' as employee, 21 as sales
UNION SELECT 2010 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-3' as employee, 22 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-1' as employee, 30 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-2' as employee, 29 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-3' as employee, 28 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-4' as employee, 27 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-1' as employee, 45 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-2' as employee, 25 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-3' as employee, 78 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-4' as employee, 23 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-1' as employee, 12 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-2' as employee, 54 as sales
UNION SELECT 2011 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-3' as employee, 79 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-1' as employee, 34 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-2' as employee, 89 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-3' as employee, 60 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-1' as employee, 23 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-2' as employee, 62 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-3' as employee, 45 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-4' as employee, 78 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-5' as employee, 45 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-6' as employee, 9 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-C' as department, 'Employee-B-C-1' as employee, 73 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-1' as employee, 93 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-2' as employee, 27 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-3' as employee, 59 as sales
UNION SELECT 2011 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-4' as employee, 73 as sales
UNION SELECT 2011 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-1' as employee, 54 as sales
UNION SELECT 2011 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-2' as employee, 67 as sales
UNION SELECT 2011 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-3' as employee, 84 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-1' as employee, 78 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-2' as employee, 69 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-3' as employee, 45 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-A' as department, 'Employee-A-A-4' as employee, 69 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-1' as employee, 24 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-2' as employee, 35 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-3' as employee, 89 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-4' as employee, 64 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-B' as department, 'Employee-A-B-5' as employee, 75 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-1' as employee, 15 as sales
UNION SELECT 2012 as year, 'Company-A' as company, 'Department-A-C' as department, 'Employee-A-C-2' as employee, 38 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-1' as employee, 46 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-2' as employee, 85 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-A' as department, 'Employee-B-A-3' as employee, 63 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-1' as employee, 24 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-2' as employee, 59 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-3' as employee, 76 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-4' as employee, 18 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-5' as employee, 94 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-B' as department, 'Employee-B-B-6' as employee, 55 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-C' as department, 'Employee-B-C-1' as employee, 69 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-1' as employee, 37 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-2' as employee, 84 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-3' as employee, 52 as sales
UNION SELECT 2012 as year, 'Company-B' as company, 'Department-B-D' as department, 'Employee-B-D-4' as employee, 55 as sales
UNION SELECT 2012 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-1' as employee, 78 as sales
UNION SELECT 2012 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-2' as employee, 94 as sales
UNION SELECT 2012 as year, 'Company-C' as company, 'Department-C-A' as department, 'Employee-C-A-3' as employee, 21 as sales
)
SELECT company,
department,
employee,
SUM(sales)
FROM company_sales
GROUP BY company,
department,
employee
ORDER BY SUM(SUM(sales))
over (
PARTITION BY company) DESC,
SUM(SUM(sales))
over (
PARTITION BY department) DESC,
SUM(SUM(sales))
over (
PARTITION BY employee) DESC,
company,
department,
employee;
在您的示例数据集中，部门是唯一的，因此您可以：
PARTITION BY department
但是，如果不止一家公司可以拥有同一个部门，您需要：
PARTITION BY company, department
旁注：由于您在 company, department, employee 上分组，因此第三个 over 子句是多余的。您可以通过省略它来简化：
ORDER BY SUM(SUM(sales)) over (PARTITION BY company) DESC
, SUM(SUM(sales)) over (PARTITION BY company, department) DESC
, SUM(sales) DESC