目前在接觸DB2，在此將DB2中使用遊標和if else ,while等收集起來進行彙總。

SET SCHEMA = "AUTEK";

CREATE PROCEDURE "AUTEK"."SP_ADDRESS" ( OUT "V_MESSAGE" VARCHAR(50) )
  SPECIFIC "SQL111214105311700"
  LANGUAGE SQL
  NOT DETERMINISTIC
  NO EXTERNAL ACTION
  MODIFIES SQL DATA
  CALLED ON NULL INPUT
  INHERIT SPECIAL REGISTERS
BEGIN
--宣告一些變數

declare v_accno varchar(32);
declare v_cusid varchar(32);
declare v_count int;
declare v_count1 int;
declare v_addrseqno varchar(10);
declare v_modidate varchar(15);
declare v_count2 int;
declare v_count3 int;
select  count(distinct cusid) into v_count from tempdaybak2;
 begin
 		declare v_cur cursor for select distinct cusid from tempdaybak2 for read only;
	 open v_cur;
	 while(v_count>0) DO
	  FETCH v_cur into v_cusid;
		--通過cusno客戶號 去從dc_ci_addr_all表中查詢結果集
		select count(*) into v_count1 from dc_ci_addr_all where cusno=v_cusid;
		if (v_count1=1) 
		then 
 	     update tempdaybak2 set address=(select addr1 from dc_ci_addr_all where dc_ci_addr_all.cusno=v_cusid) 
      , mobphone=(select mobphone from dc_ci_addr_all where dc_ci_addr_all.cusno=v_cusid)
      , post=(select postcode from dc_ci_addr_all where dc_ci_addr_all.cusno=v_cusid) where cusid=v_cusid; 
		else 
			 select min(addrseqno) into v_addrseqno from dc_ci_addr_all where cusno=v_cusid;
			 select count(*) into v_count2 from dc_ci_addr_all where cusno=v_cusid and addrseqno=v_addrseqno;
			 	if(v_count2=1) 
				then
				 update tempdaybak2 set address=(select addr1 from dc_ci_addr_all where dc_ci_addr_all.cusno=v_cusid and  dc_ci_addr_all.addrseqno=v_addrseqno) 
      , mobphone=(select mobphone from dc_ci_addr_all where dc_ci_addr_all.cusno=v_cusid and  dc_ci_addr_all.addrseqno=v_addrseqno)
      , post=(select postcode from dc_ci_addr_all where dc_ci_addr_all.cusno=v_cusid and  dc_ci_addr_all.addrseqno=v_addrseqno) where cusid=v_cusid; 
				else
				   select max(modidate)  into v_modidate from  dc_ci_addr_all where cusno=v_cusid and  addrseqno=v_addrseqno;
					 select count(*) into v_count3 from dc_ci_addr_all where cusno=v_cusid and  addrseqno=v_addrseqno and modidate=v_modidate;
						if(v_count3=1)
						then
						update tempdaybak2 set address=(select addr1 from dc_ci_addr_all where dc_ci_addr_all.cusno=v_cusid and  dc_ci_addr_all.addrseqno=v_addrseqno and modidate=v_modidate) 
      		, mobphone=(select mobphone from dc_ci_addr_all where dc_ci_addr_all.cusno=v_cusid and  dc_ci_addr_all.addrseqno=v_addrseqno and modidate=v_modidate)
     		 , post=(select postcode from dc_ci_addr_all where dc_ci_addr_all.cusno=v_cusid and  dc_ci_addr_all.addrseqno=v_addrseqno and modidate=v_modidate) where cusid=v_cusid; 
				 else
				 --取最後一個
					update tempdaybak2 set address=(select addr1  from 	dc_ci_addr_all where dc_ci_addr_all.cusno=v_cusid and  dc_ci_addr_all.addrseqno=v_addrseqno and modidate=v_modidate order by autoid desc fetch first 1 rows only)
					,mobphone=(select mobphone from dc_ci_addr_all where dc_ci_addr_all.cusno=v_cusid and  dc_ci_addr_all.addrseqno=v_addrseqno and modidate=v_modidate)
     		  ,post=(select postcode from dc_ci_addr_all where dc_ci_addr_all.cusno=v_cusid and  dc_ci_addr_all.addrseqno=v_addrseqno and modidate=v_modidate) where cusid=v_cusid; 
				 end if;
				end if;
			end if;
			set v_count=v_count-1;
	 end while;
 end;
END;

GRANT EXECUTE ON PROCEDURE "AUTEK"."SP_ADDRESS"( VARCHAR(50) ) TO USER "AUTEK" WITH GRANT OPTION;