Sort Rows of Dynamic Pivot Table - sql

Question

I have the following query to dynamically pivot some row information:
DECLARE #cols AS NVARCHAR(MAX),
#query AS NVARCHAR(MAX);
select #cols = STUFF((SELECT ',' + QUOTENAME(convert(char(50), ScheduleEndTime, 120))
FROM metersNotRead
group by ScheduleEndTime
order by ScheduleEndTime DESC
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set #query = 'SELECT ScheduleName, MeterID, CurrentGK,
' + #cols + ' from
(
select ScheduleName, MeterID, CurrentGK, ScheduleEndTime, ''Y'' flag
from metersNotRead
) x
pivot
(
max(flag)
for ScheduleEndTime in (' + #cols + ')
) p
order by ' + #cols +' DESC
'
execute(#query)
It gives me the correct results, but I am wondering how I can sort the rows by the first dynamic column, then the second, and so on, until all dynamic columns have been ordered by.
The results I have now are like this:
ScheduleName MeterID CurrentGK FirstDynamicCol SecondDynamicCol ETC
textName1 exampleID1 -- NULL Y
taxtName2 exampleID2 -- Y NULL
I want them to be like this:
ScheduleName MeterID CurrentGK FirstDynamicCol SecondDynamicCol ETC
textName2 exampleID2 -- Y NULL
taxtName1 exampleID1 -- NULL Y

Answer 1

Try this, put your first column name in its own variable, and order by that only.
DECLARE #cols AS NVARCHAR(MAX), #orderby NVARCHAR(MAX),
#query AS NVARCHAR(MAX);
select #orderby = STUFF((SELECT ',' + QUOTENAME(convert(char(50), ScheduleEndTime, 120)) + ' desc'
FROM metersNotRead
group by ScheduleEndTime
order by ScheduleEndTime DESC
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
select #cols = STUFF((SELECT ',' + QUOTENAME(convert(char(50), ScheduleEndTime, 120))
FROM metersNotRead
group by ScheduleEndTime
order by ScheduleEndTime DESC
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set #query = 'SELECT ScheduleName, MeterID, CurrentGK,
' + #cols + ' from
(
select ScheduleName, MeterID, CurrentGK, ScheduleEndTime, ''Y'' flag
from metersNotRead
) x
pivot
(
max(flag)
for ScheduleEndTime in (' + #cols + ')
) p
order by ' + #orderby
execute(#query)