SELECTMAX (discharge_amount),CHECK_YEAR
FROMims_source_item_summary
GROUP BYCHECK_year
ORDER BY CHECK_YEAR
SELECTID,MAX (discharge_amount),CHECK_YEAR
FROMims_source_item_summary
GROUP BYCHECK_year
ORDER BY CHECK_YEAR
SELECT ID,discharge_amount,check_year
FROMims_source_item_summary A
WHEREdischarge_amount IN (SELECTMAX (discharge_amount)FROMims_source_item_summary bWHEREA .check_year = b.check_year //这个很关键GROUP BYcheck_year)
ORDER BY check_year
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