Question

我有一个具有此架构的表

year,team1,team2,winner

2010,12,13,12

我想以此形式返回数据

year,winner,runner-up

可以使用sql查询吗？

Answer 1

想出框

获胜者 - 获胜team_id = 0
0 - 未获胜的team_id = -team_id

SELECT year, winner, ABS(winner - team1 - team2) AS `runner up`
FROM YourTable

SQLFiddle

Answer 2

尝试使用以下查询。肉与土豆是CASE声明，对于原始表中的每个记录，它将选择不获胜者的团队作为亚军。

SELECT year, winner, CASE WHEN team1 = winner THEN team2 ELSE team1 END AS runnerUp
FROM teamStats

点击以下链接查看正在运行的示例：

SQLFiddle

Answer 3

只需使用CASE表达式。

我们已经从winner专栏了解获奖团队。所以runner-up将是另一个。因此，我们可以使用case语句返回不在winner列中的团队..

<强>查询

SELECT `year`, winner,
    CASE winner WHEN team1 THEN team2 ELSE team1 END AS `runner-up`
FROM tblMatches;

SQL Fiddle

Answer 4

使用VIEW创建SELECT，它将作为您的临时表格，并将返回包含所需详细信息的表格。
CREATE VIEW GET_WINNER as SELECT year, winner, ABS(winner - team1 - team2) AS runner up FROM YourTable

查询返回杯子表中的赢家和输家？

4 个答案: