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plurals

POReturn all groups that have exactly the same employees
primarykey
Id
11403847
data
AcceptedAnswerId
0
AnswerCount
5
ClosedDate
CommentCount
5
CommunityOwnedDate
CreationDate
2012-07-09T21:59:34.457
FavoriteCount
0
LastActivityDate
2012-07-10T13:07:18.037
LastEditDate
2012-07-09T23:54:22.613
LastEditorUserId
57611
OwnerUserId
1513197
ParentId
0
PostTypeId
1
Score
2
ViewCount
162
LastEditorDisplayName
text
Body
There are 2 tables: <pre><code>Employee (id_employee, worker_name) Groups (id_employee, group_name) </code></pre> Here is creation script for you: <pre><code>CREATE TABLE Employee ( id_employee int identity(1,1) NOT NULL CONSTRAINT PK_Employee PRIMARY KEY CLUSTERED, worker_name nvarchar(100) CONSTRAINT UQ_Employee_worker_name UNIQUE ); CREATE TABLE Groups ( id_employee int NOT NULL CONSTRAINT FK_Groups_id_employee FOREIGN KEY REFERENCES Employee (id_employee), group_name varchar(10) NOT NULL, CONSTRAINT PK_Groups PRIMARY KEY CLUSTERED (group_name, id_employee) ); INSERT Employee SELECT 'worker 1' UNION ALL SELECT 'worker 2' UNION ALL SELECT 'worker 3' UNION ALL SELECT 'worker 4'; INSERT Groups SELECT 1, 'a1' UNION ALL SELECT 2, 'a1' UNION ALL SELECT 3, 'a2' UNION ALL SELECT 4, 'a2' UNION ALL SELECT 1, 'b1' UNION ALL SELECT 2, 'b1' UNION ALL SELECT 3, 'b2' UNION ALL SELECT 4, 'b2' UNION ALL SELECT 2, 'b3' UNION ALL SELECT 3, 'b3' UNION ALL SELECT 4, 'b3'; </code></pre> I need a query that for a given <code>id_group</code> will return all other groups that have exactly the same employees. For example: <pre><code>SELECT for 'a1' </code></pre> -> Should return 'b1' because in both groups there are: worker 1 & worker 2 <pre><code>SELECT for 'a2' </code></pre> -> Should return 'b2' because in both groups there are: worker 3 & worker 4 Note that groups need to be exactly the same, all members of <code>a1</code> need to be in <code>b1</code> and size of both groups need to be the same as well.
Tags
<sql><sql-server><sql-server-2005>
Title
Return all groups that have exactly the same employees
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1. USErikE
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 POReturn all groups that have exactly the same employees
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CommentsPostId

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