how can I count multiple Columns instead of Rows of a Calendar table?

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I have a table named "bat.student_attendance" which contains 30 columns for each day of month.
I used to update that day column on current date but also want to update total present days and total absent days on each day, for that I have to count all columns but i didnt get it done..plz do suggest .

CSS

1   12  52  5   2014-01-04 00:00:00.000 p   p   p   p   p   a   a   p   p   l   p   p   p   p   p   p   a   p   p   NULL    p   p   p   p   p   p   NULL    a   p   p   NULL    NULL    NULL
2   12  52  3   2014-01-04 00:00:00.000 p   p   p   p   NULL    a   p   p   p   p   NULL    a   a   p   p   p   a   p   l   NULL    NULL    a   p   p   l   p   p   p   a   p   p   NULL    NULL
3   12  52  6   2014-01-04 00:00:00.000 p   p   p   a   p   p   l   p   p   p   p   p   p   p   p   p   p   p   p   NULL    p   a   p   a   p   a   p   a   p   a   NULL    NULL    NULL
4   12  52  9   2014-01-04 00:00:00.000 p   p   p   p   p   p   p   p   p   a   l   a   a   NULL    a   a   p   p   p   NULL    a   p   p   p   a   p   p   p   p   p   p   NULL    NULL

Here is my table with value.

Posted 23-Apr-14 19:28pm

rahulDer

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Mukesh Ghosh · Answer 1 · 2014-04-23T20:05:00

Solution 1

Table structure like

VB

StudentID   [Date]      IsPresent
1           20-04-2014  true
2           20-04-2014  false
3           21-04-2014  true
4           21-04-2014  true
5           22-04-2014  false

rest of things lie count & all you query itself.

Posted 23-Apr-14 20:05pm

Mukesh Ghosh

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rahulDer 24-Apr-14 2:08am

its workable, but it takes 30 rows for each student and it cause memory issues for 1000+ students