pivot query without any aggregate function

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SQL

hello

i have following query

SELECT * FROM
(SELECT     FloatTable.TagIndex, FloatTable.DateAndTime, FloatTable.Val, TagTable.TagName, TagTable.TagIndex AS Expr1, TagTable.[Desc]
FROM         FloatTable INNER JOIN
                      TagTable ON FloatTable.TagIndex = TagTable.TagIndex
                      where TagTable.TagName='ANALOG\TI-1221\VALUE' or TagTable.TagName='ANALOG\TI-1222\VALUE' or TagName='ANALOG\LI-1302\VALUE' or TagName='ANALOG\LI-1303\VALUE' or TagName='ANALOG\LI-1301\VALUE' or TagName='ANALOG\TI-1403\VALUE' or TagName='ANALOG\FI-1405\VALUE' or TagName='ANALOG\FI-1401\VALUE' or TagName='ANALOG\FI-1402\VALUE' or TagName='ANALOG\FI-1404\VALUE' or TagName='ANALOG\TI-1501\VALUE' or TagName='ANALOG\LI-1501\VALUE' or TagName='ANALOG\AI-1502\VALUE' or TagName='ANALOG\FI-1302\VALUE' or TagName='ANALOG\FI-1301\VALUE' or TagName='ANALOG\PI-1401\VALUE' or TagName='ANALOG\TI-1401\VALUE' or TagName='ANALOG\TI-1402\VALUE' or TagName='ANALOG\TI-1404\VALUE' or TagName='ANALOG\AI-1501\VALUE' or TagName='ANALOG\LI-1406\VALUE' or TagName='ANALOG\FLOW-TOTAL-1201\VALUE' or TagName='ANALOG\FLOW-TOTAL-1301\VALUE' or TagName='ANALOG\FLOW-TOTAL-1302\VALUE' or TagName='ANALOG\FLOW-TOTAL-1405\VALUE') MD
PIVOT(max(VAL) FOR TagName IN ([ANALOG\TI-1221\VALUE],[ANALOG\TI-1222\VALUE],[ANALOG\LI-1302\VALUE],[ANALOG\LI-1303\VALUE],[ANALOG\LI-1301\VALUE],[ANALOG\TI-1403\VALUE],[ANALOG\FI-1405\VALUE],[ANALOG\FI-1401\VALUE],[ANALOG\FI-1402\VALUE],[ANALOG\FI-1404\VALUE],[ANALOG\TI-1501\VALUE],[ANALOG\LI-1501\VALUE],[ANALOG\AI-1502\VALUE],[ANALOG\FI-1302\VALUE],[ANALOG\FI-1301\VALUE],[ANALOG\PI-1401\VALUE],[ANALOG\TI-1401\VALUE],[ANALOG\TI-1402\VALUE],[ANALOG\TI-1404\VALUE],[ANALOG\AI-1501\VALUE],[ANALOG\LI-1406\VALUE],[ANALOG\FLOW-TOTAL-1201\VALUE],[ANALOG\FLOW-TOTAL-1301\VALUE],[ANALOG\FLOW-TOTAL-1302\VALUE],[ANALOG\FLOW-TOTAL-1405\VALUE]))PIVOTDATA

but max(val) for all columns showing null value

but they actaully containing values