如何使用指定单词计算数据？

Question

我是SQL的新面孔。 假设我有一组数据：

http://www.red-gate.com/products/dotnet-development/reflector/

我希望得到这样的结果：

==================
|| iphone6      ||
|| iphone7      ||
|| iphone7s     ||
|| Android 7.1  ||
|| Android 6.3  ||
==================

我的代码是这样的：

||Model      ||Amount   ||
==========================
||iphone     ||        3||
||Android    ||        2||
==========================

但我的输出是：

SELECT
CASE
   WHEN model LIKE '%Android%' THEN 'Android'
   WHEN model LIKE '%iPhone%' THEN 'IPhone'
END,
, COUNT(*) AS Amount FROM #table GROUP BY model;

我该如何解决？

Answer 1

您只需要按照您要创建的列进行聚合：

SELECT (CASE WHEN model LIKE '%Android%' THEN 'Android'
             WHEN model LIKE '%iPhone%' THEN 'IPhone'
        END),
       COUNT(*) AS Amount
FROM #table
GROUP BY (CASE WHEN model LIKE '%Android%' THEN 'Android'
               WHEN model LIKE '%iPhone%' THEN 'IPhone'
          END);