sql-server - texto - separar por comas en sql

nombres separados por comas basados ​​en la identificación de la compañía

Question

Tengo la siguiente tabla de detalles del empleado

EmployeeName   CompayId    CompanyLastActive
---------------------------------------------------------
robort          112        10 Jun 2015 09:30 
john            113        11 Jun 2015 11:10
sunny           114        14 Jun 2015 16:10
sumanth         114        15 Jun 2015 18:11
usha            115        07 Jun 2015 13:14
sudheer         115        14 Jun 2015 17:10
sweety          115        08 Jun 2015 16:34

Necesito obtener el último tiempo activo de empleado basado en CompanyID con EmployeeName separado por comas como a continuación

EmployeeName           CompayId        CompanyLastActive
---------------------------------------------------------
robort                 112               10 Jun 2015 09:30 
john                   113               11 Jun 2015 11:10
sunny, sumanth         114               15 Jun 2015 18:11        
usha, sudheer, sweety   115               14 Jun 2015 17:10

por favor, ayúdame a resolver.

Answer 1

Puedes usar esta consulta:

SELECT EmployeeNames = dbo.EmployeeNamesPerCompany(CompanyID,'', ''), 
       CompanyID, 
       CompanyLastActive = MAX(CompanyLastActive)
FROM Employee e
GROUP BY CompanyID
ORDER BY MAX(CompanyLastActive)

Si ha creado una función de valor escalar como esta:

CREATE FUNCTION [dbo].[EmployeeNamesPerCompany]
(
    @companyID Int,
    @delimiter varchar(5)
)
RETURNS VARCHAR(8000)
AS
BEGIN
    DECLARE @Names VARCHAR(8000) 
    SELECT   @Names = COALESCE(@Names + @delimiter, '''') + e.EmployeeName
    FROM    Employee e
    WHERE e.CompanyId = @companyID
    ORDER BY e.EmployeeName
    return @Names
END

Demo Sql-Fiddle

Answer 2

SELECT EmployeeName = STUFF((
          SELECT '','' + e1.EmployeeName
          FROM dbo.Employee e1
          WHERE e.CompayId = e1.CompayId
          FOR XML PATH(''''), TYPE).value(''.'', ''NVARCHAR(MAX)''), 1, 1, ''''),
        e.CompayId,
        MAX(CompanyLastActive) as CompanyLastActive
FROM dbo.Employee e
GROUP BY e.CompayID
ORDER BY e.CompayId

Resultado:

EmployeeName        CompayId    CompanyLastActive
-------------------------------------------------------
robort              112         June, 10 2015 09:30:00
john                113         June, 11 2015 11:10:00
sunny,sumanth       114         June, 15 2015 18:11:00
usha,sudheer,sweety 115         June, 14 2015 17:10:00

Resultado de la muestra en SQL Fiddle .

Answer 3

Mira esto, no lo he comprobado ya que me siento perezoso para construir el esquema, probablemente lanzaría un grupo por error, puedes manejarlo

SELECT 
  Results.CompayId,
  STUFF((
    SELECT '', '' + CAST(EmployeeName AS VARCHAR(MAX)) 
    FROM YourTable 
    WHERE (ID = Results.ID) 
    FOR XML PATH(''''),TYPE).value(''(./text())[1]'',''VARCHAR(MAX)'')
  ,1,2,'''') AS NameValues
  ,max(Results.CompanyLastActive) as CompanyLastActive
FROM YourTable Results
GROUP BY CompayId