Is it possible to have nested pivot in sql.i want to get school attendance gender counts of every classes within the pivoted column of every classes.

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but gender male and female count is displayed rowise but classes in column.

What I have tried:

select * from (select CAST(dateOfadmission AS DATE) Date,WardNo,gender,1 AS CntCol from ipd group by gender,dateOfAdmission,wardNo) as tr PIVOT(count(CntCol) for wardNo in ([class ii],[class 2],[class 3],[class iv],[class 5] where Month(CONVERT(smalldatetime,Date,103))=4 order by Date

Posted 29-Apr-16 9:05am

Member 8522864

Updated 29-May-16 7:33am

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CHill60 2-May-16 13:47pm

Provide some sample data and your expected results

CHill60 29-May-16 13:04pm

If you still need some assistance with this please post some sample data and an expected result

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CHill60 · Answer 1 · 2016-05-29T07:33:00

You only need a few minor changes to your query. Instead of

SQL

1 AS CntCol

use

SQL

COUNT(*) AS CntCol

There is a bug in your SQL, some missing brackets and you need to give the sub-query an alias e.g.

SQL

...,[class 5] where Month...

should be

...,[class 5])) as src where Month...

The derived column Date is already a DATE so there is no need for the conversion in the Where clause. Also if you use SQL reserved words as column names you should surround them with [ ] i.e.

SQL

Month(CONVERT(smalldatetime,Date,103))

becomes

SQL

Month([Date])

I created some sample data on what I guessed were your table structures and with this query

SQL

select * from (
	select CAST(dateOfadmission AS DATE) [Date],
		WardNo,gender, count(*) as CntCol
		from ipd 
		group by gender,dateOfAdmission,wardNo
) as tr 
PIVOT(sum(CntCol) for wardNo in ([class ii],[class 2],[class 3],[class iv],[class 5])) as src
where Month([Date])=4 order by Date

I got results that look like

Date            Gender   class ii class 2 class 3 class iv class5
2016-04-01	F	 3	  2	  3	  2	   5
2016-04-01	M	 4	  4	  4	  4	   2
2016-04-02	F	 3	  2	  3	  2	   5
2016-04-02	M	 4	  4	  4	  4	   2