计算Oracle两个TIMESTAMP相差的毫秒数

CREATE OR REPLACE FUNCTION uf_timestamp_diff（endtime in TIMESTAMP,starttime in TIMESTAMP）RETURN INTEGERAS 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;Oracle针对某列让特定信息排序[decode]jdbc向Oracle数据库插入系统时间相关资讯 Oracle教程

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