Development and coding of date format
js date format
js date format to get the current time
JS does not match with the Java and Oracle date format, the month before the date js-generated format with 0.
method one,
Date.prototype.format = function (format) {
var o = {
"M+": this.getMonth() + 1, // month
"d+": this.getDate(), // day
"h+": this.getHours(), // hour
"m+": this.getMinutes(), // minute
"s+": this.getSeconds(), // second
"q+": Math.floor((this.getMonth() + 3) / 3), // quarter
"S": this.getMilliseconds()
// millisecond
};
if (/(y+)/.test(format))
format = format.replace(RegExp.$1, (this.getFullYear() + "")
.substr(4 - RegExp.$1.length));
for (var k in o)
if (new RegExp("(" + k + ")").test(format))
format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length));
return format;
}
var dt= new Date(data);
return dt.format("yyyy-MM-dd hh:mm:ss");Second way: yyyy-MM-dd hh: mm: ss
Date.prototype.format = function(fmt) {
var o = {
"M+" : this.getMonth()+1, // 月份
"d+" : this.getDate(), // 日
"h+" : this.getHours(), // 小时
"m+" : this.getMinutes(), // 分
"s+" : this.getSeconds(), // 秒
"q+" : Math.floor((this.getMonth()+3)/3), // 季度
"S" : this.getMilliseconds() // 毫秒
};
if(/(y+)/.test(fmt)) {
fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length));
}
for(var k in o) {
if(new RegExp("("+ k +")").test(fmt)){
fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length)));
}
}
return fmt;
}
var time = new Date().format("yyyy-MM-dd hh:mm:ss");
$("#trbrqs").val(time);
$('#trbrqs').attr("readonly","readonly");Three ways: yyyyMMdd
function getNowFormatDate()
{
var day = new Date();
var Year = 0;
var Month = 0;
var Day = 0;
var CurrentDate = "";
Year = day.getFullYear();//ie火狐下都可以
Month = day.getMonth()+1;
Day = day.getDate();
CurrentDate += Year + "";
if (Month >= 10 )
{
CurrentDate += Month + "";
}
else
{
CurrentDate += "0" + Month + "";
}
if (Day >= 10 )
{
CurrentDate += Day ;
}
else
{
CurrentDate += "0" + Day ;
}
return CurrentDate;
}
var namesalt = getNowFormatDate();
js Date object
In javascript date is its built-in objects, so we want to get and operations on date, must instantiate objects.
1. Create a date object
var dateobj = new Date ();
will contain information about the local time, including the year, month, week, day, hour
Note: the month and week are counted from 0
2. Date of acquisition methods
Date() 返回当日的日期和时间。
getDate() 从 Date 对象返回一个月中的某一天 (1 ~ 31)。
getDay() 从 Date 对象返回一周中的某一天 (0 ~ 6)。
getMonth() 从 Date 对象返回月份 (0 ~ 11)。
getFullYear() 从 Date 对象以四位数字返回年份。
getYear() 请使用 getFullYear() 方法代替。
getHours() 返回 Date 对象的小时 (0 ~ 23)。
getMinutes() 返回 Date 对象的分钟 (0 ~ 59)。
getSeconds() 返回 Date 对象的秒数 (0 ~ 59)。
getMilliseconds() 返回 Date 对象的毫秒(0 ~ 999)。
getTime() 返回 1970 年 1 月 1 日至今的毫秒数。
getTimezoneOffset() 返回本地时间与格林威治标准时间 (GMT) 的分钟差。 3. The method of setting the date
setDate() 设置 Date 对象中月的某一天 (1 ~ 31)。
setMonth() 设置 Date 对象中月份 (0 ~ 11)。
setFullYear() 设置 Date 对象中的年份（四位数字）。
setYear() 请使用 setFullYear() 方法代替。
setHours() 设置 Date 对象中的小时 (0 ~ 23)。
setMinutes() 设置 Date 对象中的分钟 (0 ~ 59)。
setSeconds() 设置 Date 对象中的秒钟 (0 ~ 59)。
setMilliseconds() 设置 Date 对象中的毫秒 (0 ~ 999)。
setTime() 以毫秒设置 Date 对象。
setUTCDate() 根据世界时设置 Date 对象中月份的一天 (1 ~ 31)。
setUTCMonth() 根据世界时设置 Date 对象中的月份 (0 ~ 11)。
setUTCFullYear() 根据世界时设置 Date 对象中的年份（四位数字）。
setUTCHours() 根据世界时设置 Date 对象中的小时 (0 ~ 23)。
setUTCMinutes() 根据世界时设置 Date 对象中的分钟 (0 ~ 59)。
setUTCSeconds() 根据世界时设置 Date 对象中的秒钟 (0 ~ 59)。
setUTCMilliseconds() 根据世界时设置 Date 对象中的毫秒 (0 ~ 999)。 <script type="text/javascript">
var date=new Date();
document.write(date.getTime()+"<br/>");
document.write(date.getFullYear()+"<br/>");
document.write((date.getMonth()+1)+"<br/>");
document.write(date.getDate()+"<br/>");
var today=date.getFullYear()+"年"+(date.getMonth()+1)+"月"+date.getDate()+"日";
document.write(today+"<br/>");
document.write(date.getHours()+"<br/>");
document.write(date.getMinutes()+"<br/>");
document.write(date.getSeconds()+"<br/>");
today=date.getFullYear()+"年"+(date.getMonth()+1)+"月"+date.getDate()+"日 "+date.getHours()+":"+date.getMinutes()+":"+date.getSeconds();
document.write(today+"<br/>");
var day=date.getDay();
var week;
switch(day){
case 0:week="星期日";break;
case 1:week="星期一";break;
case 2:week="星期二";break;
case 3:week="星期三";break;
case 4:week="星期四";break;
case 5:week="星期五";break;
case 6:week="星期六";break;
}
document.write(week+"<br/>");
today=date.getFullYear()+"年"+(date.getMonth()+1)+"月"+date.getDate()+"日 "+week+" "+date.getHours()+":"+date.getMinutes()+":"+date.getSeconds();
document.write(today+"<br/>");
</script>
Js the first day of the month and the last day of calculation
$(function() {
var nowdays = new Date();
var year = nowdays.getFullYear();
var month = nowdays.getMonth()+1;
if(month==0)
{
month=12;
year=year-1;
}
if (month < 10) {
month = "0" + month;
}
var firstDay = year + "-" + month + "-" + "01";
var myDate = new Date(year, month, 0);
var lastDay = year + "-" + month + "-" + myDate.getDate();
var start = $("#ks").val(firstDay)
var end = $("#js").val(lastDay);
));
Countdown time display
function getcha (now,end) {
var arr=[];
var cha=(end.getTime()-now.getTime())/1000;
var days=parseInt(cha/(60*60*24));
arr.push(days)
cha%=(60*60*24);
var hours=parseInt(cha/(60*60));
arr.push(hours)
cha%=60*60;
var mints=parseInt(cha/60);
arr.push(mints)
var sends=cha%60;
arr.push(sends)
return arr;
}
window.onload=function () {
var spans=document.getElementsByTagName("span");
var end=new Date();
end.setFullYear(2012);
end.setMonth(7);
end.setDate(12);
end.setHours(12);
end.setMinutes(0);
end.setSeconds(0);
var now=new Date();
for (var i=0; i<getcha (now,end).length; i++) {
spans[i].innerHTML=getcha (now,end)[i]
}
setInterval(function () {
var now=new Date();
for (var i=0; i<getcha (now,end).length; i++) {
spans[i].innerHTML=getcha (now,end)[i]
}
},1000)
}
<div>
距离奥运会还有<span></span>天<span></span>小时<span></span>分钟<span></span>秒
</div>
Oracle date formatting
oracle date format to get the current time
The definition of oracle date format
Year:
yy two digits 两位年 显示值:07
yyy three digits 三位年 显示值:007
yyyy four digits 四位年 显示值:2007
Month:
mm number 两位月 显示值:11
mon abbreviated 字符集表示 显示值:11月,若是英文版,显示nov
month spelled out 字符集表示 显示值:11月,若是英文版,显示november
Day:
dd number 当月第几天 显示值:02
ddd number 当年第几天 显示值:02
dy abbreviated 当周第几天简写 显示值:星期五,若是英文版,显示fri
day spelled out 当周第几天全写 显示值:星期五,若是英文版,显示friday
ddspth spelled out, ordinal twelfth
Hour:
hh two digits 12小时进制 显示值:01
hh24 two digits 24小时进制 显示值:13
Minute:
mi two digits 60进制 显示值:45
Second:
ss two digits 60进制 显示值:25
其它
Q digit 季度 显示值:4
WW digit 当年第几周 显示值:44
W digit 当月第几周 显示值:1
24小时格式下时间范围为： 0:00:00 - 23:59:59....
12小时格式下时间范围为： 1:00:00 - 12:59:59 .... Usually in the form of a time stamp date formats are stored in the database, the front-end interface to query through the pages, some of the attributes of an object we will be back to check out the page.
@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss" )
The reason: the data transmitted back page, in the form of a string. So the time format to be wrong. Add this note, the background time format string can be resolved. But backstage reached the front desk can not resolve. You need to do the following.
@JsonFormat comment
<tr style="height: 50px">
<th style="width: 70px">拆除日期:</th>
<td style="width: 230px" colspan="3">
<input name="removeTime" class="easyui-my97" data-options="required:true" style="width: 200px;" >
</td>
</tr>
<td style="width: 200px" colspan="3">
<input name="approveTime" class="easyui-textbox" style="width: 170px;" >
</td>@JsonFormat(pattern = "yyyy-MM-dd")
@DateTimeFormat(pattern = "yyyy-MM-dd")
private Date removeTime;//拆除日期
@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
private Date approveTime;//审批时间
oracle to find the first day of the month, last day
SELECT Trunc(Trunc(SYSDATE, 'MONTH') - 1, 'MONTH') First_Day_Last_Month,
Trunc(SYSDATE, 'MONTH') - 1 / 86400 Last_Day_Last_Month,
Trunc(SYSDATE, 'MONTH') First_Day_Cur_Month,
LAST_DAY(Trunc(SYSDATE, 'MONTH')) + 1 - 1 / 86400 Last_Day_Cur_Month
FROM dual;
oracle calculation date a year ago
create or replace view v_rgq_one as
select "CODE","NAME","CUR_TIME","CUR_AMOUNT","VARIATION","LAST_TIME","LAST_AMOUNT" from (
select
cur_year.sj as cur_time,
cur_year.yql as cur_amount,
cur_year.yql-last_year.yql as variation,
last_year.sj as last_time,
last_year.yql as last_amount
from SMCOUNT cur_year left join sm_count last_year
on cur_year.sj =
to_char(add_months(to_date(last_year.sj, 'YYYY-MM-DD'), +12),
'YYYY-MM-DD')
order by cur_year.sj desc);
View a tables of data an hour ago
select * from ct_user as of timestamp sysdate-(1/(24));
add_months (x, y) or add_months (times, months) Function: many months after the date of computing, if the latter is negative, many months before the date of the current date is calculated.
select add_months(sysdate,-6) from dual;//查询的结果是当前时间半年前的时间
select add_months(sysdate,6) from dual;//查询的结果是当前时间半年后的时间
select ename, hiredate from emp where hiredate <= add_months(sysdate, -288);//入职时间超过24年-288 = -24*12
last_day (): Returns the date of the last day of the month;
select last_day(sysdate) from dual;//查询当前月份的最后一天：
select last_day(to_date('1992-10-09','yyyy-mm-dd')) from dual;//查询某天所在月份的最后一天：
TO_DATE () function, the string to date
Note: SQL case-insensitive, and the MM mm is considered to be the same format code, using Oracle's SQL mi minutes instead of
Another 24 hours to be displayed in the form of use HH24
update t_date set d3=to_date('2016-12-20','YYYY-MM-DD') where id=1;
update t_date set d3=to_date('2016-12-20 18:31:34','YYYY-MM-DD HH24:MI:SS') where id=1;The number of days between two dates
select floor(sysdate - to_date('20020405','yyyymmdd')) from dual; Supplement; look for the number of days 2002-02-28 to 2002-02-01 Room except Monday and seven
select count(*)
from ( select rownum-1 rnum
from all_objects
where rownum <= to_date('2002-02-28','yyyy-mm-dd') - to_date('2002-
02-01','yyyy-mm-dd')+1
)
where to_char( to_date('2002-02-01','yyyy-mm-dd')+rnum-1, 'D' )
not in ( '1', '7' )
months_between () function returns the number of months between two dates. If the same number of days within two days of the month, or is the last day of a particular month to return an integer, otherwise, it returns the value decimal, number of days remaining 1 / month per day 31 months. If the date 1 than the date 2 small, negative value is returned.
months_between(to_date('1999.11.29','yyyy.mm.dd'), to_date('1998.11.29','yyyy.mm.dd'))
返回 12
注：两个参数均为同样月份的29号，所以返回一整数。
months_between(to_date('1999.11.29','yyyy.mm.dd'), to_date('1998.12.24','yyyy.mm.dd'))
返回 13.16129If the date two different times, he even out of date difference divided by 31, the result is a bunch of decimal places.
select months_between(to_date('01-31-2008','MM-DD-YYYY'),to_date('12-31-1998','MM-DD-YYYY')) "MONTHS" FROM DUAL;
1
select months_between(to_date('02-01-2008','MM-DD-YYYY'),to_date('12-31-1998','MM-DD-YYYY')) "MONTHS" FROM DUAL;
1.03225806451613
Defined functions processing month difference
create or replace function fun_month_num (var_begin_date in varchar2,var_end_date in varchar2)
return number
as
is_begin_date date;
is_end_date date;
is_count number(10);
i number(10);
j number(10);
is_this_date date;
begin
is_begin_date := to_date(var_begin_date,'yyyy-mm-dd');
is_end_date := to_date(var_end_date,'yyyy-mm-dd');
is_this_date := last_day(is_end_date) ;
is_count := 0 ;
loop
exit when is_this_date < last_day(is_begin_date)+1 ;
is_count := is_count+1;
is_this_date := last_day(is_this_date)-32;
end loop;
return is_count;
end;use
select fun_month_num('2008-09-30','2008-02-01') from dual;
next_day()
NEXT_DAY (date, char) date to a date parameter
Next week's return date, day 1-7 or Sunday - Saturday, Sunday 1 represents
1,234,567
Ri one hundred twenty-three thousand four hundred fifty-six
next_day(sysdate,6)是从当前开始下一个星期五。
后面的数字是从星期日开始算起。 select next_day(to_date('2014-4-1','yyyy-MM-dd'),'星期三') from dual;
从特定日期得到之后的第一个星期三的日期。
select next_day( sysdate, 'MONDAY') from dual;
可以求出当前日期的下个星期一。
next_day(to_date('1999.11.24','yyyy.mm.dd')，'friday')
// 返回 1999年11月26日
//1999年11月24日是星期三，第二个参数是星期五，是两天后。
TO_CHAR () date format
select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') as nowTime from dual; //日期转化为字符串
select to_char(sysdate,'yyyy') as nowYear from dual; //获取时间的年
select to_char(sysdate,'mm') as nowMonth from dual; //获取时间的月
select to_char(sysdate,'dd') as nowDay from dual; //获取时间的日
select to_char(sysdate,'hh24') as nowHour from dual; //获取时间的时
select to_char(sysdate,'mi') as nowMinute from dual; //获取时间的分
select to_char(sysdate,'ss') as nowSecond from dual; //获取时间的秒 Gets the number of hours Comparison
select sysdate ,to_char(sysdate,'hh') from dual;
//2003-10-13 19:35:21 07
select sysdate ,to_char(sysdate,'hh24') from dual;
//2003-10-13 19:35:21 19
the trunc () function processing Date
Syntax: TRUNC (date [, fmt])
Wherein: date a date value; date format FMT.
The date will be the date specified format interception; ignored by most recent date intercepted.
select trunc(sysdate) from dual;--2017/2/13,返回当前时间
select trunc(sysdate,'yy') from dual;--2017/1/1,返回当年第一天
select trunc(sysdate,'mm') from dual;--2017/2/1,返回当月的第一天
select trunc(sysdate,'d') from dual;--2017/2/12,返回当前星期的第一天，即星期天
select trunc(sysdate,'dd') from dual;--2017/2/13,返回当前日期,今天是2017/2/13
select trunc(sysdate ,'HH24') from dual;--2017/2/13 15:00:00,返回本小时的开始时间
select trunc(sysdate ,'MI') from dual;--2017/2/13 15:13:00,返回本分钟的开始时间
trunc(sysdate,'year') YEAR, //返回当前年的1月1日,无时分秒
trunc(sysdate,'month') MONTH , //返回当前月的1日,无时分秒
trunc(sysdate,'day') DAY //返回当前星期的星期天,无时分秒
对number类型则截取小数,截取时并不对数据进行四舍五入。
select trunc(123.567,2) from dual;--123.56,将小数点右边指定位数后面的截去;
select trunc(123.567,-2) from dual;--100,第二个参数可以为负数，表示将小数点左边指定位数后面的部分截去，即均以0记;
select trunc(123.567) from dual;--123,默认截去小数点后面的部分;
extract () function for intercepting interval from the date type or types to a specific portion;
select extract(year from sysdate) from dual;
select extract(month from sysdate) from dual;
select extract(day from sysdate) from dual;
select extract(Hour from systimestamp) from dual;
select extract(minute from systimestamp) from dual;
select extract(second from systimestamp) from dual;
select extract(timezone_hour from systimestamp) th from dual;
select extract(timezone_minute from systimestamp) tm from dual;
select extract(timezone_region from systimestamp) tr from dual;
select extract(timezone_abbr from systimestamp) ta from dual;Specific time between the two dates, can extract () function;
select extract(day from dt2-dt1) day
,extract(hour from dt2-dt1) hour
,extract(minute from dt2-dt1) minute
,extract(second from dt2-dt1) second
from
( select to_timestamp('2013-02-04 15:07:00','yyyy-mm-dd hh24:mi:ss') dt1,to_timestamp('2013-11-30 22:08:46', 'yyyy-mm-dd hh24:mi:ss') dt2 from dual
);
round [rounded to the nearest date] (day: rounded to the nearest Sunday). And trunc difference is, trunc () rounding operation is not performed, only interception
select sysdate S1,
round(sysdate) S2 ,
round(sysdate,'year') YEAR,
round(sysdate,'month') MONTH ,
round(sysdate,'day') DAY from dual
greatest return date list of the latest date
select greatest('01-1月-04','04-1月-04','10-2月-04') from dual
oracle date conversion
oracle calculating hours, minutes, seconds, milliseconds
select
Days,
A,
TRUNC(A*24) Hours,
TRUNC(A*24*60 - 60*TRUNC(A*24)) Minutes,
TRUNC(A*24*60*60 - 60*TRUNC(A*24*60)) Seconds,
TRUNC(A*24*60*60*100 - 100*TRUNC(A*24*60*60)) mSeconds
from
(
select
trunc(sysdate) Days,
sysdate - trunc(sysdate) A
from dual
) oracle conversion calculation date
floor((date2-date1) /365) 作为年
floor((date2-date1, 365) /30) 作为月
d(mod(date2-date1, 365), 30)作为日.当前时间减去7分钟的时间
select sysdate,sysdate - interval ’7’ MINUTE from dual
当前时间减去7小时的时间
select sysdate - interval ’7’ hour from dual
当前时间减去7天的时间
select sysdate - interval ’7’ day from dual
当前时间减去7月的时间
select sysdate,sysdate - interval ’7’ month from dual
当前时间减去7年的时间
select sysdate,sysdate - interval ’7’ year from dual
时间间隔乘以一个数字
select sysdate,sysdate - 8 *interval ’2’ hour from dualDate day converted to seconds
select (sysdate-to_date('2003-12-03 12:55:45','yyyy-mm-dd hh24:mi:ss'))*24*60*60 from dual
