id, taskcode, taskworker, gastype, gasvalue, gasunit, iswarn, isyujing, issms, ismend, updatetime select * from taskgas 1=1 and taskcode = #{condition.taskcode} and gastype = #{condition.gastype} SELECT * FROM ( SELECT * FROM `taskgas` taskcode = #{taskCode} AND taskworker = #{worker} ORDER BY updatetime DESC LIMIT 100 ) t GROUP BY t.gastype