Question

I have this query

SELECT semester, COUNT(id) AS total, RIGHT(RTRIM(semester), 4) AS year 
FROM TextbookReservation 
WHERE (semester IS NOT NULL) 
AND (semester <> '')
AND (semester <> 'SM2008') 
AND semester <> 'SU2008') 
GROUP BY semester ORDER BY year, semester DESC

Which produces something like this:

semester  total year
SP2006    2277  2006
FA2006    4367  2006
SP2007    2893  2007
FA2007    5624  2007
SP2008    4083  2008
FA2008    6451  2008

I would like to return something like this:

year  totalSpring totalFall
2006  2277        4367
2007  2893        5624
2008  4083        6451

Any ideas on how I can approach this query? Thanks!

Answer 1

Without PIVOT tables, since you didn’t specify the version:

SELECT [year], 
sum(case WHEN left(semester,2)='SP' then total ELSE 0 END) as totalSpring ,
sum(case WHEN left(semester,2)='FA' THEN total else 0 end) as totalFall
from (

       SELECT semester
            , count(id) AS total
            , right(RTRIM(semester), 4) AS year
       FROM
           TextbookReservation
       WHERE
           semester IS NOT NULL
           AND semester <> ''
           AND semester <> 'SM2008'
           AND semester <> 'SU2008'
       GROUP BY
           semester 
) t
GROUP BY t.[year]
order by t.[year]