create global temporary table sd2_userinfo_temp  --建立臨時表
(
  id number
) on commit delete rows;

create or replace trigger tri_sd2userinfo_adr    --建立行級觸發器
 after delete on sd2_userinfo
 referencing old as old new as new
 for each row
 begin
   insert into sd2_userinfo_temp values(:old.id);
 end;

create or replace trigger tri_sd2userinfo_ads    --建立語句級觸發器
 after delete on sd2_userinfo
declare
   num number;
   mem varchar2(20);
   lea number;
   userid number;
 begin
   select id into userid from sd2_userinfo_temp;
   delete from sd2_trade where sd2_trade.owner=userid;  --刪除他的交易記錄
   select sd2_troop.leader,sd2_troop.numbers,sd2_troop.member into lea,num,mem from sd2_troop where sd2_troop.member like concat(userid,':%') or sd2_troop.member like concat(concat('%:',userid),':%');
   EXCEPTION
     WHEN NO_DATA_FOUND
     THEN
     RETURN;
   if(lea=userid) then  --當該使用者為某隊的隊長時
     delete from sd2_troop where sd2_troop.leader=lea; --刪除該戰隊
     update sd2_userinfo set sd2_userinfo.troopid=0 where mem like concat(sd2_userinfo.id,':%') or mem like concat(concat('%:',userid),':%');
   elsif(num=2)  then   --當用戶為隊員，且該隊的成員數為2時
     delete from sd2_troop where sd2_troop.leader=lea; --刪除該戰隊
     update sd2_userinfo set sd2_userinfo.troopid=0 where sd2_userinfo.id=lea;  --將該隊的隊長的troopid置為0
   elsif(num>2)  then   --當用戶為隊員，且該隊的成員數大於2時
     update sd2_troop set sd2_troop.numbers=num-1,sd2_troop.member=replace(mem,concat(userid,':'),'') where sd2_troop.leader=lea;
   end if;
 end;