学步园

CREATE OR REPLACE FUNCTION uf_timestamp_diff(endtime in TIMESTAMP,starttime in TIMESTAMP)
RETURN INTEGER
AS
	str VARCHAR2(50);
	misecond INTEGER;
	seconds INTEGER;
	minutes INTEGER;
	hours INTEGER;
	days INTEGER;
BEGIN
	str:=to_char(endtime-starttime);
	misecond:=to_number(SUBSTR(str,INSTR(str,' ')+10,3));
	seconds:=to_number(SUBSTR(str,INSTR(str,' ')+7,2));
	minutes:=to_number(SUBSTR(str,INSTR(str,' ')+4,2));
	hours:=to_number(SUBSTR(str,INSTR(str,' ')+1,2));
	days:=to_number(SUBSTR(str,1,INSTR(str,' ')));
 
 	RETURN days*24*60*60*1000+hours*60*60*1000+minutes*60*1000+seconds*1000+misecond;
END;