选择同一列不同的地方条件

Question

该查询返回的“封闭”的总和一个特定的日期范围内每日销售特定销售人员：

 
SELECT SUM(price) as closed_total 
FROM dbo.Sales 
WHERE salesperson_ID = @salesperson_ID 
     AND date_ordered BETWEEN @start_date AND @end_date 
     AND closed = 1 
GROUP BY date_ordered 

输出看起来像：

 
daily_total 
200 
150 
325 
120 
(etc) 

我想修改查询以返回一列用于封闭销售，并为所有销售（相同查询，但不包含'closed = 1'条件）返回一列，并输出如下内容：

 
closed_total | all_total 
200   | 275 
150   | 150 
325   | 500 
120   | 280 
(etc) 

我使用UNION到单独的查询相结合，这样的尝试：

 
SELECT SUM(price) as closed_total 
FROM dbo.Sales 
WHERE salesperson_ID = @salesperson_ID 
     AND date_ordered BETWEEN @start_date AND @end_date 
     AND closed = 1 
GROUP BY date_ordered 
UNION ALL 
SELECT SUM(price) as all_total 
FROM dbo.Sales 
WHERE salesperson_ID = @salesperson_ID 
     AND date_ordered BETWEEN @start_date AND @end_date 
GROUP BY date_ordered 

我想这可能做什么，我一直在寻找，但它把两个和到名为“closed_total”一列。有任何想法吗？

Answer 1

你可以试试这个

SELECT SUM(price) as total, SUM(CASE WHEN closed = 1 THEN price ELSE 0 END) as closed_total 
FROM dbo.Sales 
WHERE salesperson_ID = @salesperson_ID 
     AND date_ordered BETWEEN @start_date AND @end_date 
GROUP BY date_ordered