一、获取两个时间之前的小时数
select ceil((To_date('2008-05-01 02:00:00' , 'yyyy-mm-dd hh24-mi-ss') - To_date('2008-04-30 23:59:59' , 'yyyy-mm-dd hh24-mi-ss')) * 24 ) 在厂小时数 FROM SCM_GDHJLD2
二、截取字符串
select substr(DIAODAOJIAOWANSHIJIAN,1,18) from SCM_GDHJLD2
三、DATE类型转为数字类型
select to_number(to_char(
to_date(to_char(DIAOHUIJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')-to_date
(to_char(DIAODAOJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')))*24 as 在厂时间 from SCM_GDHJLD2
四、比较两个日期大小。
select * from scm_gdhjld2 where to_date(to_char(DIAOHUIJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')
>to_date('2017-03-21 00:00:00','yyyy-mm-dd hh24:mi:ss')
五、修改在厂时间字段的值(调到时间和调回时间比较)。
update SCM_GDHJLD2 set zaichangshijian = to_char(to_number(to_char(
to_date(to_char(DIAOHUIJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')-to_date
(to_char(DIAODAOJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')))*24)
where to_date(to_char(DIAODAOJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')
>to_date('2017-03-21 00:00:00','yyyy-mm-dd hh24:mi:ss')
六、获取系统当前时间。
select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual
七、修改在厂时间字段的值(调到时间和系统当前时间比较)。
update SCM_GDHJLD2 set zaichangshijian = to_char(to_number(to_char(
to_date((select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual),'yyyy-mm-dd hh24:mi:ss')-to_date
(to_char(DIAODAOJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')))*24)
where to_date(to_char(DIAODAOJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')
>to_date('2017-03-21 00:00:00','yyyy-mm-dd hh24:mi:ss')
八、写的存储过程(写完之后写一个计时器每隔一小时调用这个存储过程，即可完成前台数据的更新)。
CREATE OR REPLACE PROCEDURE HOURS() AS
Cursor cursor is select diaohuijiaowanshijian from SCM_GDHJLD2 where
to_date(to_char(DIAODAOJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')
>to_date('2017-03-24 00:00:00','yyyy-mm-dd hh24:mi:ss');
diaohuijiaowanshijian TIMESTAMP(6);
BEGIN
for diaohuijiaowanshijian in cursor loop
if(diaohuijiaowanshijian is null)
then
update SCM_GDHJLD2 set zaichangshijian = to_char(to_number(to_char(
to_date((select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual),'yyyy-mm-dd hh24:mi:ss')-to_date
(to_char(DIAODAOJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')))*24)
where to_date(to_char(DIAODAOJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')
>to_date('2017-03-21 00:00:00','yyyy-mm-dd hh24:mi:ss');
else then
update SCM_GDHJLD2 set zaichangshijian = to_char(to_number(to_char(
to_date(to_char(DIAOHUIJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')-to_date
(to_char(DIAODAOJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')))*24)
where to_date(to_char(DIAODAOJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')
>to_date('2017-03-24 00:00:00','yyyy-mm-dd hh24:mi:ss');
end if;
end loop;
END HOURS;
V_SCM_GDHJLD2 FOR UPDATE
九、写一个视图，可以直接实现功能。
CREATE OR REPLACE FORCE VIEW "ZBWL"."V_SCM_GDHJLD2" ("BILLDTLID", "BILLID", "ROWNO", "CHEXING", "CHEHAO", "FAZHAN", "SHOUHUODANWEI", "SUDU", "MAOZHONG", "PIZHONG", "JINGZHONG", "PINMING", "DIAODAOJIAOWANSHIJIAN", "KAISHIZHUANGXIESHIJIAN", "ZHUANGXIEWANLESHIJIAN", "DIAOHUIJIAOWANSHIJIAN", "DAOZHAN", "BIAOZHONG", "YINGKUI", "CHESHU", "ZAICHANGSHIJIAN") AS FOR UPDATE
select BILLDTLID,BILLID,ROWNO,CHEXING,CHEHAO,FAZHAN,SHOUHUODANWEI,SUDU,MAOZHONG,PIZHONG,JINGZHONG,PINMING,
DIAODAOJIAOWANSHIJIAN,
KAISHIZHUANGXIESHIJIAN ,
ZHUANGXIEWANLESHIJIAN ,
DIAOHUIJIAOWANSHIJIAN ,
DAOZHAN,
BIAOZHONG,
YINGKUI,
CHESHU,
ROUND (( case when DIAOHUIJIAOWANSHIJIAN IS NULL then ((select sysdate from dual))- to_date(to_char(DIAODAOJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')
else to_date(to_char(DIAOhuiJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss')- to_date(to_char(DIAODAOJIAOWANSHIJIAN,'yyyy-mm-dd hh24:mi:ss'),'yyyy-mm-dd hh24:mi:ss') end )*24,1) AS ZAICHANGSHIJIAN from scm_gdhjld2
;
十、建立的定时器。
DECLARE
JOB1 PLS_INTEGER;
BEGIN
SYS.DBMS_JOB.SUBMIT(JOB => JOB1,
WHAT => 'HOURS;',
NEXT_DATE => SYSDATE,
INTERVAL => 'sysdate+1/24');
COMMIT;
END;
十一、查看定时器。
select * from user_jobs;
十二、查看定时器执行情况。
select job,last_date,last_sec,next_date,next_sec,broken,failures from dba_jobs;
)
