How can i turn a table from this form:
S_ID SUBJECT MARK
1 English 90
1 Math 40
1 Computer 30
2 English 85
2 Math 10
2 Computer 06
3 English 10
3 Math 20
3 Computer 40
To this form
S_ID English Math Computer
1 90 40 30
2 85 10 06
3 10 20 40
using SQL code,
I'm using MS Access 2010,
Thank you
SELECT S_ID ,
MAX(CASE WHEN subject = 'English' THEN mark ELSE null END) AS English,
MAX(CASE WHEN subject = 'Math' THEN mark ELSE null END) AS Math,
MAX(CASE WHEN subject = 'Computer' THEN mark ELSE null END) AS Computer
FROM myTable
GROUP BY S_ID
You want a cross-tab query which will yield a column per subject;
TRANSFORM Sum(MARK) AS TotalMark
SELECT
S_ID
FROM marks
GROUP BY S_ID
PIVOT SUBJECT;
if this is a one time exercise, you could use many statements, sequentially: something like this:
insert into new_table
select distinct s_id, 0,0,0
from old_table
then a series of updates
update new_table n
set english = (select english from old_table where s_id = n.s_id )
where s_id = n.s_id
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