Question

我有一个Microsoft SQL表，其中包含organization列和mi_status列，两者都是字符串。我想找出每个（按分组）组织有多少记录有mi -status的“有库存”，有多少总记录，然后有多少记录有库存。

我可以通过以下方式轻松获得In Stock部分：

SELECT organization, count(*)
FROM table
WHERE mi_status = 'In Stock'
GROUP BY organiztion

但我不知道如何在同一个选择中获取总行数，因为我在那里有'where'子句。

Answer 1

使用条件聚合：

SELECT organization, count(*) as total,
       SUM(CASE WHEN mi_status = 'In Stock' THEN 1 ELSE 0 END) as total_instock,
       AVG(CASE WHEN mi_status = 'In Stock' THEN 1.0 ELSE 0 END) as proportion_instock
FROM table
GROUP BY organization;

Answer 2

使用CASE表达式：

SELECT  organization, 
        SUM(CASE WHEN mi_status = 'In Stock' THEN 1 ELSE 0 END) In_Stock,
        COUNT(*) Total,
        SUM(CASE WHEN mi_status = 'In Stock' THEN 1 ELSE 0 END)*100.0/COUNT(*) Percentage
FROM dbo.YourTable
GROUP BY organization;

Answer 3

SELECT 
    organization, 
    count(*), 
    (SELECT COUNT(*) FROM table) as total
FROM 
    table
WHERE 
    mi_status = 'In Stock'
GROUP BY 
    organization

SQL％的数据包含值

3 个答案: