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  • oracle常用函数_时间

    https://blog.csdn.net/qq_39720920/article/details/85274428

    https://blog.csdn.net/qq_37768482/article/details/78148034

    https://blog.csdn.net/hustzw07/article/details/51426935

    1.时间比较

     and createDate >= to_date('2019-03-11','yyyy-mm-dd HH24:mi:ss')
     and createDate <= to_date('2019-03-13','yyyy-mm-dd HH24:mi:ss')+1
    

     2.ORACLE中date和timestamp的相互转化

     cast(taskfinishtime As Date) as taskfinishtime2,
     to_char(taskfinishtime,'yyyy-mm-dd hh24:mi:ss') as taskfinishtime3,

    相关链接: https://blog.csdn.net/huangbaokang/article/details/80733411

    3.Oralce 将时间差转换为  天:时:分:秒

    学习链接: https://blog.csdn.net/yzy85/article/details/80566651

    SELECT 
       (EXTRACT(DAY FROM (to_date('2012-03-30 23:23:15','YYYY-MM-DD HH24:MI:ss')-to_date('2012-03-29 00:23:00','YYYY-MM-DD HH24:MI:ss')) DAY TO SECOND )
       || '天'
       ||EXTRACT(HOUR FROM (to_date('2012-03-30 23:23:15','YYYY-MM-DD HH24:MI:ss')-to_date('2012-03-29 00:23:00','YYYY-MM-DD HH24:MI:ss')) DAY TO SECOND )
       || '时'
       || EXTRACT(MINUTE FROM (to_date('2012-03-30 23:23:15','YYYY-MM-DD HH24:MI:ss')-to_date('2012-03-29 00:23:00','YYYY-MM-DD HH24:MI:ss')) DAY TO SECOND )
       || '分'
       || EXTRACT(SECOND FROM (to_date('2012-03-30 23:23:15','YYYY-MM-DD HH24:MI:ss')-to_date('2012-03-29 00:23:00','YYYY-MM-DD HH24:MI:ss')) DAY TO SECOND )
       || '秒')  as timespan
    FROM DUAL;

    时间戳:

    to_date(TO_CHAR(p.finishtime, 'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')-to_date(TO_CHAR(p.createtime, 'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')

    4. Oracle中的instr()函数 详解及应用

    学习: https://www.cnblogs.com/dshore123/p/7813230.html

    instr(org.TOTALCODE, '0001,1000,2010,0008,0113') > 0

    5.Oracle 行转列 动态出转换的列

    学习: https://blog.csdn.net/Huay_Li/article/details/82924443

     

     

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  • 原文地址:https://www.cnblogs.com/Steven5007/p/11188005.html
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