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SQL Puzzle | Matches won & lost by Each team [Asia Cup Puzzle – II]
In this puzzle you have a table called Team. Here you have information like which team has played with which team and who won that match. You have write a T-SQL to get all teams, number of matches they have played and the number of matches won by each team.
For details please check out the sample input and the expected output below.
|Sri Lanka||Pakistan||Sri Lanka|
|Bangladesh||Sri Lanka||Sri Lanka|
- The challenge is to do it with T-SQL statements only.
- Add your solution(s) in the comments section or send you solution(s) to email@example.com
Script | use below script to create table and insert some sample data
-- CREATE TABLE [dbo].[AsiaCup]( [TeamA] [varchar](10) NULL, [TeamB] [varchar](10) NULL, [WonBy] [varchar](10) NULL ) ON [PRIMARY] GO INSERT [dbo].[AsiaCup] ([TeamA], [TeamB], [WonBy]) VALUES (N'Pakistan', N'India', N'India') GO INSERT [dbo].[AsiaCup] ([TeamA], [TeamB], [WonBy]) VALUES (N'Sri Lanka', N'India', N'India') GO INSERT [dbo].[AsiaCup] ([TeamA], [TeamB], [WonBy]) VALUES (N'Bangladesh', N'India', N'India') GO INSERT [dbo].[AsiaCup] ([TeamA], [TeamB], [WonBy]) VALUES (N'Sri Lanka', N'Pakistan', N'Sri Lanka') GO INSERT [dbo].[AsiaCup] ([TeamA], [TeamB], [WonBy]) VALUES (N'Bangladesh', N'Pakistan', N'Bangladesh') GO INSERT [dbo].[AsiaCup] ([TeamA], [TeamB], [WonBy]) VALUES (N'Bangladesh', N'Sri Lanka', N'Sri Lanka') GO INSERT [dbo].[AsiaCup] ([TeamA], [TeamB], [WonBy]) VALUES (N'India', N'Sri Lanka', N'India') GO --
SOLUTION – 1
-- SELECT tbl.Team, COUNT(1) MatchesPlayed, SUM(CASE WHEN team = wonby THEN 1 ELSE 0 end) MatchesWon FROM ( SELECT a.teamA team, a.wonby FROM asiacup a UNION all select b.teamb, b.wonby FROM asiacup b ) tbl GROUP BY tbl.team --
Add a comment if you have a solution in mind. I would love to learn it. We all need to learn.
Enjoy !!! Keep Learning