我有这张桌子: table
我想知道是否有一些SQL查询返回如下所示: result
我尝试了一下,但是没有用:
SELECT Object,
SUM(CASE WHEN Key = 'A' THEN Qty END) As Key A,
SUM(CASE WHEN Key = 'B' THEN Qty END) As Key B
FROM tab
甚至添加了GROUP BY子句,但错误出在CASE子句
答案 0 :(得分:1)
我期望这样的事情:
SELECT Object,
SUM(CASE WHEN Key = 'A' THEN Qty END) As KeyA,
SUM(CASE WHEN Key = 'B' THEN Qty END) As KeyB
FROM table -- table won't work as a table name
GROUP BY object;
我添加了GROUP BY
并修复了列别名。
答案 1 :(得分:0)
在执行汇总时在查询中添加分组依据
SELECT Object,
SUM(CASE WHEN Key = 'A' THEN Qty END) As Key_A,
SUM(CASE WHEN Key = 'B' THEN Qty END) As Key_B
FROM table group by Object
您已经使用了列别名名称的空间,但我将其更改了