在 SQL 中将多行显示到不同的列中

Question

我有以下查询，它显示了同一产品但不同销售状态的不同行中的产品列表：

select distinct productname as 'Product', sale_status as 'Sold/Unsold', count(distinct i.item_number) as 'Total Items'
            from item i
            left join department d on i.item_number = d.item_number
            where d.term = 'WINTER' and d.year = '2014'
            group by productname,sale_status
            order by productname

输出为：

       Product       Sold/Unsold        Total Items
        Bags            SOLD                 20
        Bags            UNSOLD              100
        Shoes           SOLD                 30
        Shoes           UNSOLD               50

现在我需要将输出显示为：

       Product         SOLD        UNSOLD        Total Items
        Bags            20          100             120
        Shoes           30           50              80

我尝试使用 PIVOT 来实现如下所示的任务，但我无法实现这个目标。它说：关键字 'PIVOT'.

附近的语法不正确

select distinct productname as 'Product', sale_status as 'Sold/Unsold', count(distinct i.item_number) as 'Total Items'
            from item i
            left join department d on i.item_number = d.item_number
            where d.term = 'WINTER' and d.year = '2014'
            group by productname,sale_status
            order by productname
            PIVOT
            (
            SUM (Total Items)
            FOR [Sold/Unsold] IN ([SOLD], [UNSOLD])
            ) as P

有什么建议或任何其他可能的方法来实现这个目标吗？

Answer 1

将您当前的查询放在子查询中，然后旋转您的子查询

SELECT  Product, 
    [SOLD], 
    [UNSOLD], 
    [SOLD] + [UNSOLD] AS [Total Items] 
FROM
(
    SELECT DISTINCT
        productname AS [Product],
        sale_status AS [Sold/Unsold],
        COUNT(DISTINCT i.item_number) AS [Total Items]
    FROM
        item i
        LEFT JOIN department d ON i.item_number = d.item_number
    WHERE
        d.term = 'WINTER'
        AND d.year = '2014'
    GROUP BY
        productname,
        sale_status
) T
PIVOT 
(
    SUM([Total Items])
    FOR [Sold/Unsold] IN ([SOLD],[UNSOLD])
) p

在 SQL 中将多行显示到不同的列中

Show multiple rows into different columns in SQL

sql

sql-server

pivot