在Oracle 当中如要实现下面这种情况 2 月分的销售总金额= 1 月分金额 + 2 月分的金额 3 月分的销售总金额= 1 月分金额 + 2 月分的金额 + 3 月分的金额。 ... 12 月分的销售总金额= 1 + 2 + ... 12 月分金额。
时间: 2024-01-20 13:03:44 浏览: 24
你可以使用Oracle中的分析函数来实现这个需求,具体步骤如下:
1. 使用SUM函数计算每个月的销售总金额,生成一个包含月份和对应销售总金额的表格。
2. 使用窗口函数SUM() OVER(ORDER BY month)计算每个月份之前所有月份的销售总金额之和,生成一个包含月份和对应销售总金额之和的表格。
3. 使用JOIN操作将两个表格按月份连接起来,得到一个包含每个月份和对应销售总金额之和的表格。
4. 使用CASE语句根据月份计算对应的销售总金额。例如,对于2月份,使用1月份金额加上2月份金额之和的值。
以下是示例代码:
```
SELECT t1.month,
(CASE t1.month
WHEN 1 THEN t1.sales_total
WHEN 2 THEN t2.sales_total_sum
WHEN 3 THEN t3.sales_total_sum
WHEN 4 THEN t4.sales_total_sum
WHEN 5 THEN t5.sales_total_sum
WHEN 6 THEN t6.sales_total_sum
WHEN 7 THEN t7.sales_total_sum
WHEN 8 THEN t8.sales_total_sum
WHEN 9 THEN t9.sales_total_sum
WHEN 10 THEN t10.sales_total_sum
WHEN 11 THEN t11.sales_total_sum
WHEN 12 THEN t12.sales_total_sum
END) AS sales_total
FROM (
SELECT month, SUM(amount) AS sales_total
FROM sales_table
GROUP BY month
) t1
LEFT JOIN (
SELECT month, SUM(sales_total) OVER (ORDER BY month) AS sales_total_sum
FROM (
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month <= 2
GROUP BY month
UNION ALL
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month > 2 AND month <= 12
GROUP BY month
)
) t2 ON t1.month = 2 AND t2.month = 2
LEFT JOIN (
SELECT month, SUM(sales_total) OVER (ORDER BY month) AS sales_total_sum
FROM (
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month <= 3
GROUP BY month
UNION ALL
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month > 3 AND month <= 12
GROUP BY month
)
) t3 ON t1.month = 3 AND t3.month = 3
LEFT JOIN (
SELECT month, SUM(sales_total) OVER (ORDER BY month) AS sales_total_sum
FROM (
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month <= 4
GROUP BY month
UNION ALL
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month > 4 AND month <= 12
GROUP BY month
)
) t4 ON t1.month = 4 AND t4.month = 4
LEFT JOIN (
SELECT month, SUM(sales_total) OVER (ORDER BY month) AS sales_total_sum
FROM (
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month <= 5
GROUP BY month
UNION ALL
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month > 5 AND month <= 12
GROUP BY month
)
) t5 ON t1.month = 5 AND t5.month = 5
LEFT JOIN (
SELECT month, SUM(sales_total) OVER (ORDER BY month) AS sales_total_sum
FROM (
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month <= 6
GROUP BY month
UNION ALL
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month > 6 AND month <= 12
GROUP BY month
)
) t6 ON t1.month = 6 AND t6.month = 6
LEFT JOIN (
SELECT month, SUM(sales_total) OVER (ORDER BY month) AS sales_total_sum
FROM (
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month <= 7
GROUP BY month
UNION ALL
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month > 7 AND month <= 12
GROUP BY month
)
) t7 ON t1.month = 7 AND t7.month = 7
LEFT JOIN (
SELECT month, SUM(sales_total) OVER (ORDER BY month) AS sales_total_sum
FROM (
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month <= 8
GROUP BY month
UNION ALL
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month > 8 AND month <= 12
GROUP BY month
)
) t8 ON t1.month = 8 AND t8.month = 8
LEFT JOIN (
SELECT month, SUM(sales_total) OVER (ORDER BY month) AS sales_total_sum
FROM (
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month <= 9
GROUP BY month
UNION ALL
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month > 9 AND month <= 12
GROUP BY month
)
) t9 ON t1.month = 9 AND t9.month = 9
LEFT JOIN (
SELECT month, SUM(sales_total) OVER (ORDER BY month) AS sales_total_sum
FROM (
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month <= 10
GROUP BY month
UNION ALL
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month > 10 AND month <= 12
GROUP BY month
)
) t10 ON t1.month = 10 AND t10.month = 10
LEFT JOIN (
SELECT month, SUM(sales_total) OVER (ORDER BY month) AS sales_total_sum
FROM (
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month <= 11
GROUP BY month
UNION ALL
SELECT month, SUM(amount) AS sales_total
FROM sales_table
WHERE month = 12
GROUP BY month
)
) t11 ON t1.month = 11 AND t11.month = 11
LEFT JOIN (
SELECT month, SUM(amount) AS sales_total_sum
FROM sales_table
WHERE month <= 12
GROUP BY month
) t12 ON t1.month = 12 AND t12.month = 12;
```
这个查询会返回一个包含每个月份和对应销售总金额的表格,其中每个月份的销售总金额是根据要求计算得出的。
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