Question

我在岩石，纸张，剪刀游戏上工作，我有一张桌子可以保存圆形结果，但是我在每一轮中每个玩家节省一排，所以如果有N个球员他们每轮也会N行。

我想要的是显示一个如何进行巡视的报告，但我不想每轮显示N行，我想要显示一个显示播放器数据和N列的单行最后一栏显示获胜者的名字。

目前这是我生成的报告：

| Round |      Player       |  Shape   | Won |
|-------|-------------------|----------|-----|
|     1 | george (Player 1) | Rock     |   0 |
|     1 | wendy (Player 2)  | Paper    |   1 |
|     2 | george (Player 1) | Rock     |   0 |
|     2 | wendy (Player 2)  | Rock     |   0 |
|     3 | george (Player 1) | Paper    |   1 |
|     3 | wendy (Player 2)  | Rock     |   0 |
|     4 | george (Player 1) | Scissors |   0 |
|     4 | wendy (Player 2)  | Rock     |   1 |
|     5 | george (Player 1) | Scissors |   0 |
|     5 | wendy (Player 2)  | Scissors |   0 |

我的预期结果是这样的：

| Round | Player1Name | Player2Name | Player1Shape | Player2Shape |   PlayerWinner   |
|-------|-------------|-------------|--------------|--------------|------------------|
|     1 | george      | wendy       | Paper        | Rock         | Wendy (Player2)  |
|     2 | george      | wendy       | Rock         | Rock         | Draw (No Winner) |
|     3 | george      | wendy       | Paper        | Rock         | George (Player1) |
|     4 | george      | wendy       | Scissors     | Rock         | Wendy (Player2)  |
|     5 | george      | wendy       | Scissors     | Scissors     | Draw (No Winner) |

我不知道这种报告是否可行我不是T-SQL的专家，我使用的是SQL Server 2016.

在这里，您可以看到一个SQL Fiddle，其中包含3个与真实模型非常相似的表，其中包含测试数据和用于生成第一个报告的T-SQL代码。

我将非常感谢您的帮助

Answer 1

使用条件聚合和一些字符串操作：

select 
    Round
  , Player1Name  = max(case when left(right(player,2),1)='1' then left(Player,charindex(' (',Player)) end)
  , Player2Name  = max(case when left(right(player,2),1)='2' then left(Player,charindex(' (',Player)) end)
  , Player1Shape = max(case when left(right(player,2),1)='1' then Shape end)
  , Player2Shape = max(case when left(right(player,2),1)='2' then Shape end)
  , PlayerWinner = max(case when won = 1 then Player else 'Draw (NoWinner)' end)
from t
group by Round

rextester演示：http://rextester.com/DRPRZV13212

返回：

+-------+-------------+-------------+--------------+--------------+-------------------+
| Round | Player1Name | Player2Name | Player1Shape | Player2Shape |   PlayerWinner    |
+-------+-------------+-------------+--------------+--------------+-------------------+
|     1 | george      | wendy       | Rock         | Paper        | wendy (Player 2)  |
|     2 | george      | wendy       | Rock         | Rock         | Draw (NoWinner)   |
|     3 | george      | wendy       | Paper        | Rock         | george (Player 1) |
|     4 | george      | wendy       | Scissors     | Rock         | wendy (Player 2)  |
|     5 | george      | wendy       | Scissors     | Scissors     | Draw (NoWinner)   |
+-------+-------------+-------------+--------------+--------------+-------------------+

更新：最初sql小提琴不会加载，但一旦它加载，我将模式复制到rextester（虽然在小提琴数据中只有3轮）：

select 
    R.RoundNumber as Round
  , Player1Name  = max(case when p.Number=1 then p.Name end)
  , Player2Name  = max(case when p.Number=2 then p.Name end)
  , Player1Shape = max(case when p.Number=1 then r.PlayerShape end)
  , Player2Shape = max(case when p.Number=2 then r.PlayerShape end)
  , PlayerWinner = max(case when r.IsWinner = 1 then concat(p.Name, ' (Player ',p.Number,')')
    else 'Draw (NoWinner)' end)
from [dbo].[Game] as G
  inner join [dbo].[Player] as P 
    on G.Token = P.GameToken
  inner join [dbo].[Round] as R 
    on P.Token = R.PlayerToken
where G.Token = 'A0cc2B30-6D2D-446F-9D44-58ba08F7eae5'
group by RoundNumber
order by R.RoundNumber asc

rextester演示：http://rextester.com/KUA90275

返回：

+-------+-------------+-------------+--------------+--------------+-------------------+
| Round | Player1Name | Player2Name | Player1Shape | Player2Shape |   PlayerWinner    |
+-------+-------------+-------------+--------------+--------------+-------------------+
|     1 | george      | wendy       | Rock         | Paper        | wendy (Player 2)  |
|     2 | george      | wendy       | Rock         | Rock         | Draw (NoWinner)   |
|     3 | george      | wendy       | Paper        | Rock         | george (Player 1) |
+-------+-------------+-------------+--------------+--------------+-------------------+

如何使用自定义列名称在一行中连接多个行

1 个答案: