oracle julian date conversion

　　Linux timestamp to date: Create a custom Function:Create or Replace functionUnix_to_oracle (In_number Number)returnDate isbegin return(To_date ('19700101','YYYYMMDD')+In_number/86400 +To_number (substr (Tz_offset (Sessiontimezone),1,3))/ -); EndUnix_to_oracle;Use:Select unix_to_oracle (1509490525 from dual;Date to Linux timestamp:Create or Replace functionOracle_to_unix (in_dateinchDatereturn Number i

It is convenient to use timestamp to record datetime, but sometimes it is not necessary to display the milliseconds after the decimal point, so you need to redefine the format when converting to string. timestamp converted to string: SimpleDateFormat df = new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss");//defines the format, does not display millisecondsTimestamp now = new Timestamp (System.currenttimemillis ());//Get system Current timeString str = Df.format (now); Convert String to timestamp: Simp

The date display format is different between the different pages in the project,First question:For example, I use the date control wdatepicker.js only in the input tag to add onclick= "Wdatepicker ()" can be used, but the default is no time and seconds, if needed to display the minute and seconds only need to add Wdatepicker ({ DATEFMT: ' Yyyy-mm-dd HH:mm:ss '}) on the line.*********************************

+08:00--insert into EMP (ename,hiredate) VALUES (' Jack ', sysdate);---date conversion function---1:to_date ()---Resolves a given string to a date value in the given format---Other characters in a date format string that are not letters or symbols need to be enclosed in double quotation marks.---single quotation marks

]): converts the specified time (data, timestamp, timestamp with Time Zone) to the varchar2 type according to the specified format;Example: Select to_char (sysdate, 'yyyy-mm-dd hh24: MI: ss') from dual; Convert value-> character to_char (N [, FMT]): Convert the specified value n to the varchar2 type according to the specified format FMT and return it;Example: Select to_char (-100, 'l99g999d99mi ') from dual; 2. to_date (C [, FMT [, NLS]) converts char, nchar, varchar2, and nvarchar2 to the

, To_char () This function can be divided into three small categories, respectively, are  Convert character-> character To_char (c): Convert Nchar,nvarchar2,clob,nclob type to CHAR type; For example: SELECT to_char (' aabbcc ') from DUAL;  Conversion Time-> character To_char (d[,fmt]): Converts the specified time (Data,timestamp,timestamp with times zone) to the VARCHAR2 type in the specified format; For example: SELECT to_char (sysdate, ' Yyyy-mm-

This article is not ready to introduce all of the Oracle functions, in the current situation, I do not have this time, need to learn too much, to spend most of the time on learning to use the technical aspects:), so if you are ready to learn all the Oracle functions of friends, or to focus on: Oracle SQL Reference official documents are more reliable. This artic

Common Oracle functions-date functions, oracle date functions In the development and use of oracle, a variety of date functions are often used. The online date functions are searched fo

Label:1. Conversion functionThe most significant relationship with the date operation is two conversion functions: To_date (), To_char ()The To_date () function converts a character type to a date type in a certain format:Specific usage: to_date (' 2004-11-27 ', ' yyyy-mm-dd '), the former is a string, the latter is a

Example of mutual conversion between ORACLE milliseconds and dates, and oracle mutual conversion Convert millisecond to date SELECT TO_CHAR(1406538765000 / (1000 * 60 * 60 * 24) + TO_DATE('1970-01-01 08:00:00', 'YYYY-MM-DD HH:MI:SS'), 'YYYY-MM-DD HH24:MI:SS') AS CDATE FROM D