Question

表有销售额，我正在尝试计算销售额和总销售额百分比。

WITH t1 AS (
    SELECT
    product_id,
    sum(financial_charge_cents) as cents
    FROM "account_charges"
    WHERE account_id = 5
    AND status = 'Charged'
    GROUP BY product_id
    ORDER BY cents DESC
)
SELECT 
    product_id, 
    cast(cents as money) / 100.0 AS dollars, 
    cents / (sum(cents) OVER (PARTITION BY product_id)) as percent
FROM t1
ORDER BY dollars DESC

但这会使所有百分比返回1而不确定原因。

不确定这是类型问题还是什么问题。

Answer 1

OVER (PARTITION BY produuct_id)导致总和与cents相同。您不需要分区：

SELECT 
    product_id, 
    cast(cents as money) / 100.0 AS dollars, 
    cents* 1.0 / (sum(cents) OVER ()) as percent
FROM t1
ORDER BY dollars DESC

注意，我添加了*1.0来获取数字结果。如果cents是数字（非整数），则跳过它。

PostgreSQL总和和子查询总数的百分比

1 个答案: