-- 计算指定日期本周的第一天和最后一天 select day ,dayofweek(day) as dw1 ,date_add( - dayofweek(day)) as Su_s -- 周日_start ,date_add( - dayofweek(day)) as Sa_e -- 周六_end , end as dw2 ,date_add( end) as Mo_s -- 周一_start ,date_add( end) as Su_e -- 周日_end from ( select '2