Estoy usando Microsoft SQL Server 2005.

Creo que necesito una subconsulta.

Estoy buscando una (1) fila por cliente, con el campo AvailableAction una concatenación de todas las acciones para cada cliente.

use tempdb
GO
IF DB_ID('myDatabase') IS NOT NULL
  DROP DATABASE myDatabase
go
CREATE DATABASE myDatabase 
GO
USE myDatabase
GO
create table Cust(
CustID Int Identity Primary Key,
CustName Varchar(255)
)
GO
INSERT INTO Cust(CustName) values('One')
INSERT INTO Cust(CustName) values('Two')
GO
CREATE TABLE Action(
ActionID Int Identity(101,1) Primary Key,
ActionName Varchar(128)
)
GO
INSERT INTO Action(ActionName) VALUES('Insert')
INSERT INTO Action(ActionName) VALUES('Update')
INSERT INTO Action(ActionName) VALUES('Delete')
INSERT INTO Action(ActionName) VALUES('Print')
GO
create table CustAction(
CustActionID Int Identity Primary Key,
CustID Int,
ActionID Int
)
GO
INSERT INTO CustAction(CustID,ActionID) VALUES(1,101)
INSERT INTO CustAction(CustID,ActionID) VALUES(1,102)
INSERT INTO CustAction(CustID,ActionID) VALUES(2,102)
INSERT INTO CustAction(CustID,ActionID) VALUES(2,103)
GO
SELECT Cust.CustID,CustName,ActionName
FROM CustAction
JOIN Cust
ON CustAction.CustID = Cust.CustID
JOIN Action
ON CustAction.ActionID = Action.ActionID
GO
SELECT 
Cust.CustID,CustName,
'<option value="' + CAST(Action.ActionID AS Varchar) + '">' + ActionName + '</option>' AS AvailableAction
FROM CustAction
JOIN Cust
ON CustAction.CustID = Cust.CustID
JOIN Action
ON CustAction.ActionID = Action.ActionID

Me gustaría que la salida sea:

CustID AvailableAction

    1  <option value="101">Insert</option><option value="102">Update</option>
    2  <option value="102">Update</option><option value="103">Delete</option>