時間相加的函數(如對一個時間加上13秒)

時間相加的函數(如對一個時間加上13秒)
 
create or replace function HRF_GET_TIME(V_DATE DATE,V_NUM NUMBER,V_TYPE VARCHAR2) return date is
Result DATE;
begin
IF V_TYPE='D' THEN 
select V_DATE+numtodsinterval(V_NUM,'DAY') INTO Result from dual; 
ELSIF V_TYPE='H' THEN 
select V_DATE+numtodsinterval(V_NUM,'HOUR') INTO Result from dual; 
ELSIF V_TYPE='M' THEN 
select V_DATE+numtodsinterval(V_NUM,'minute') INTO Result from dual; 
ELSIF V_TYPE='S' THEN 
select V_DATE+numtodsinterval(V_NUM,'SECOND') INTO Result from dual; 
END IF;
 
return(Result);
end HRF_GET_TIME;

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