Question

I have an Inventory table containing Master file info and 2 Movement History tables (Current Year and Last Year).

I want to use a Query to extract Movements from (say) June LAST Year to March THIS Year in Code, Date sequence.

I am relatively new to SQL and have tried to use the following INNER JOIN structure to do this:

SELECT Code, Descrip, Category, MLast.Date, MLast.DocNo, MCurr.Date, MCurr.DocNo
    FROM Stock AS S 
INNER JOIN MoveTrnArc MLast ON MLast.Stockcode = S.Code
    AND MLast.Date >='2011/06/01' AND MLast.Date <='2012/03/31'
INNER JOIN MoveTrn MCurr ON MCurr.Stockcode = S.Code 
    AND MCurr.Date >='2011/06/01' AND MCurr.Date <='2012/03/31'
ORDER BY S.Code

This creates a Query Table with the following column structure:

Code | Descrip | Category | Date | DocNo | Date | DocNo | 

…where the data from the LAST Year table appears in the first Date/DocNo columns and the CURRENT Year data appears in the second Date/DocNo columns.

What must I do to the Query to have each Movement in its own row or is there a better, more efficient Query to achieve this?

Also, I need the Movements listed in Code followed by Date sequence.

Answer 1

use union all instead of joins

select s.Code , s.Descrip , s.Category , t.Date , t.DocNo  
from 
(
select Stockcode, Date, DocNo from MoveTrnArc 
union all
select Stockcode, Date, DocNo from MoveTrn 
) t join Stock s on s.Code = t.Stockcode
where t.Date >='2011/06/01' AND t.Date <='2012/03/31'

beside careful with comparing dates, if Date column is type datetime and includes time you have to change t.Date <='2012/03/31' into t.Date <'2012/04/01' to include all the rows from 31st of march,
as ‘2012/03/31’ is casted as ‘2012/03/31 00:00:00.000’