sql - Bad value returned using EXISTS -


i trying return minimum fiscalyear grouping on productid using subquery , exists operator. whatever reason, getting arbitrary value set of fiscal years. subquery returns minimum fiscalyear outer query won't pick update. ideas?

update#temp set sales_year = sa.fiscalyear sales    sa join products p  on p.id = sa.productid join #temp    t  on p.id = t.productid exists ( select min(sa.fiscalyear),                         sa.productid                sales    sa                 join products p  on p.id = sa.productid                join #temp    t  on p.id = t.productid                group sa.productid              )

you don't need join's outside exists. in addition, assume using sql server.

actually, don't think want exists @ all. use = this:

update t    set sales_year = sa.fiscalyear  #temp t t.product_id = (select top 1 sa.productid                       sales sa join                            products p                            on p.id = sa.productid                       order sa.fiscalyear                      )

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