add another colum in a database?

Question

i have created a database that hooks in with my program, problem is i forgot to add in a colum .... i kmnow how to do this by editing the table, problem is how do i then get it to the program and to act like the others already on there?
wil i need to create a new data source? i tried this once and then NONE of them worked, none of the colums would save the changes.
&note* .. the new item i created appears in the database exporer window but NOT in the data source exporer .. im not sure what to do

thanks

Answer 1

Assuming yout Table1 will have all working day timings(except for leaves) and Table2 will have Leaves information Below TSQL can give you the required result.
SELECT * INTO #Temp
FROM
(
SELECT
[empid]
,[attdate] AS [Date]
,CAST(DAY([attdate]) AS VARCHAR(2))+ '(' +CAST([attdate] AS VARCHAR(25))+')' AS [Day]
,'Status' = CASE WHEN [ workedhours] > 8 THEN 'P' ELSE 'AB' END
FROM [Table1]
UNION
SELECT
[empid]
,[leavedate] AS [Date]
,CAST(DAY([leavedate]) AS VARCHAR(2))+ '(' +CAST([leavedate] AS VARCHAR(25))+')' AS [Day]
,'Status' = 'L'
FROM [Table2]
) AS [Result]

SELECT DISTINCT [Date],[Day] INTO #Temp2 FROM #Temp ORDER BY [Date]

DECLARE @ColumnNames NVarchar(MAX)
DECLARE @SqlQuery NVARCHAR(max)

SELECT @ColumnNames=STUFF((
select ',['+ [Day] +']'
from #Temp2
FOR XML PATH('')
)
,1,1,'')

SET @SqlQuery = N'SELECT [empID],' + @ColumnNames +' FROM (Select [EmpId],[Day],[Status] From #Temp) P Pivot (MAX([Status]) For [Day] in (' +@ColumnNames+'))AS PivotTable;'

EXEC Sp_executeSql @SqlQuery