i have 3 tables: accounts, bank1, bank2. i need to sum the field [mybalance] from both bank1 and bank2 where acctnum from bank1 and bank2 exist in accounts. all acctnum in bank1 are in accounts; all of acctnum in bank2 are in accounts; none of acctnum in bank1 are in bank2 and vice versa...
in creating a db where there are multiple physical files, is there an advantage to changing the file extension of the extended physical file from .NDF to .MDF? if so, is there a white paper on it?
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