sql - Improving update performance in ACCESS -


i have 2 tables in access:

tbl_rm: (+ primary key)   + customername (short text)   + countrycode  (short text)   + rmdate       (date/time - format mmm-yy)   + serialnumber (short text)     blackclicks  (double)     colorclicks  (double)     accentclicks (double)     professionalcolorclicks (double)

the second table

tbl_invoices: (+ primary key)   + customername (short text)   + countrycode  (short text)   + invoicedate  (date/time)   + serialnumber (short text)     blackclicks  (double)     colorclicks  (double)

tbl_rm contains 98 496 records (out of 9113 match query below)

tbl_invoices contains 9 618 records (all matching below request).

i want update tbl_invoices data tbl_rm. here update query:

update tbl_invoices inner join tbl_rm        on tbl_invoices.customername = tbl_rm.customername       , tbl_invoices.countrycode = tbl_rm.countrycode       , tbl_invoices.serialnumber = tbl_rm.serialnumber       , month(tbl_rm.rmdate) = month(tbl_invoices.invoicedate)       , year(tbl_rm.rmdate) = year(tbl_invoices.invoicedate) set tbl_invoices.blackpages =  tbl_rm.blackclicks + tbl_rm.accentclicks, tbl_invoices.colorpages =  tbl_rm.colorclicks + tbl_rm.professionalcolorclicks

when running in access 2013 takes hours compute. guess there way speed up. suggestion welcome.

the first suggestion index on tbl_rm(customername, countrycode serialnumber). might enough. if not might need handle dates in index well.


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