SQL - Include rows that don't return Sum results being cut from Query -

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newish sql - pulling items inventory point vendor information , levels @ last database update. test inventory i'm using building query, contains 35 inventory items.

i additionally added sum of usage on time frame function query, cuts of 18 items weren't used in timeframe i've given. (the usage pulls negative need abs additionally)

sample text is:

select item_no, inv_point, par_level,        abs(sum(quantity_used) usage from....

do need split query 2 , can add usage column right of existing query , display null if no results? i've looked on here similar issues , tried coalesce can't seem work.

thanks





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