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  • oracle的日期格式转换函数function

    CREATE OR REPLACE FUNCTION F_IRT_DATE_YYYYMMDD(ENTER VARCHAR2)

    /****
    *生效日期的格式为YYYYMMDD,输入日期格式为:16-JUL-15( 日期-月份-年)
    *例如:20151231
    *
    *
    ****/
    RETURN VARCHAR2 IS
    NIENDATE DATE;
    NUM VARCHAR2(3);
    INPUT_CHAR VARCHAR2(32) := ENTER;
    BEGIN
    /*
    JAN-01
    FEB-02
    MAR-03
    APR-04
    MAY-05
    JUN-06
    JUL-07
    AUG-08
    SEP-09
    OCT-10
    NOV-11
    DEC-12
    */

    SELECT SUBSTR(INPUT_CHAR,4,3) INTO NUM FROM DUAL;
    IF NUM = 'JAN' THEN
    NIENDATE := TO_DATE('20'||SUBSTR(INPUT_CHAR,8,2)||'01'||SUBSTR(INPUT_CHAR,1,2),'YYYYMMDD');
    ELSIF NUM = 'FEB' THEN
    NIENDATE := TO_DATE('20'||SUBSTR(INPUT_CHAR,8,2)||'02'||SUBSTR(INPUT_CHAR,1,2),'YYYYMMDD');
    ELSIF NUM = 'MAR' THEN
    NIENDATE := TO_DATE('20'||SUBSTR(INPUT_CHAR,8,2)||'03'||SUBSTR(INPUT_CHAR,1,2),'YYYYMMDD');
    ELSIF NUM = 'APR' THEN
    NIENDATE := TO_DATE('20'||SUBSTR(INPUT_CHAR,8,2)||'04'||SUBSTR(INPUT_CHAR,1,2),'YYYYMMDD');
    ELSIF NUM = 'MAY' THEN
    NIENDATE := TO_DATE('20'||SUBSTR(INPUT_CHAR,8,2)||'05'||SUBSTR(INPUT_CHAR,1,2),'YYYYMMDD');
    ELSIF NUM = 'JUN' THEN
    NIENDATE := TO_DATE('20'||SUBSTR(INPUT_CHAR,8,2)||'06'||SUBSTR(INPUT_CHAR,1,2),'YYYYMMDD');
    ELSIF NUM = 'JUL' THEN
    NIENDATE := TO_DATE('20'||SUBSTR(INPUT_CHAR,8,2)||'07'||SUBSTR(INPUT_CHAR,1,2),'YYYYMMDD');
    ELSIF NUM = 'AUG' THEN
    NIENDATE := TO_DATE('20'||SUBSTR(INPUT_CHAR,8,2)||'08'||SUBSTR(INPUT_CHAR,1,2),'YYYYMMDD');
    ELSIF NUM = 'SEP' THEN
    NIENDATE := TO_DATE('20'||SUBSTR(INPUT_CHAR,8,2)||'09'||SUBSTR(INPUT_CHAR,1,2),'YYYYMMDD');
    ELSIF NUM = 'OCT' THEN
    NIENDATE := TO_DATE('20'||SUBSTR(INPUT_CHAR,8,2)||'10'||SUBSTR(INPUT_CHAR,1,2),'YYYYMMDD');
    ELSIF NUM = 'NOV' THEN
    NIENDATE := TO_DATE('20'||SUBSTR(INPUT_CHAR,8,2)||'11'||SUBSTR(INPUT_CHAR,1,2),'YYYYMMDD');
    ELSIF NUM = 'DEC' THEN
    NIENDATE := TO_DATE('20'||SUBSTR(INPUT_CHAR,8,2)||'12'||SUBSTR(INPUT_CHAR,1,2),'YYYYMMDD');
    END IF;
    RETURN(NIENDATE);


    END F_IRT_DATE_YYYYMMDD;

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  • 原文地址:https://www.cnblogs.com/qadyyj/p/5416065.html
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