delete from tbl_produce where id not in ( select max(p.id) from tbl_produce p join tbl_animal_info a on p.animal_id= a.id group by a.rfid , p.produce_date,animal_id ); declare v_date date; v_id number(20); cursor r is select animal_id,count(*) as num from tbl_produce group by animal_id ; thedata r%rowtype; begin update tbl_produce set production_num=null; commit; open r ; loop fetch r into thedata; exit when r%notfound; for i in 1..thedata.num loop select min(produce_date) into v_date from tbl_produce where animal_id=thedata.animal_id and production_num is null order by produce_date ; update tbl_produce set production_num=i where animal_id=thedata.animal_id and produce_date=v_date; commit; end loop; end loop; end;
产仔数据订正.sql
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