DB2 时间转换

DB2 时间转换

create function ts_fmt(TS timestamp, fmt varchar(20)) returns varchar(50) return with tmp (dd,mm,yyyy,hh,mi,ss,nnnnnn) as ( select substr( digits (day(TS)),9), substr( digits (month(TS)),9) , rtrim(char(year(TS))) , substr( digits (hour(TS)),9), substr( digits (minute(TS)),9), substr( digits (second(TS)),9), rtrim(char(microsecond(TS))) from sysibm.sysdummy1 ) select case fmt when 'yyyymmdd' then yyyy || mm || dd when 'mm/dd/yyyy' then mm || '/' || dd || '/' || yyyy when 'yyyy/dd/mm hh:mi:ss' then yyyy || '/' || mm || '/' || dd || ' ' || hh || ':' || mi || ':' || ss when 'nnnnnn' then nnnnnn else 'date format ' || coalesce(fmt,' ') || ' not recognized.' end from tmp 使用例句： update t_attachment as a set a.attach_path=(select '/'||rtrim(char(apply_com_id))||'/'||rtrim(char(ts_fmt(apply_date,'yyyymmdd')))||'/' from t_rmbs_claim as c where a.claim_id=c.claim_id)||rtrim(a.attach_path) where exists (select 1 from t_rmbs_claim as tc where tc.claim_id=a.claim_id);