#Oracle week number iso

SYSDATE returns the current date and time set for the operating system on which the database resides. SYS_EXTRACT_UTC extracts the UTC (Coordinated Universal Time–formerly Greenwich Mean Time) from a datetime value with time zone offset or time zone region name. SESSIONTIMEZONE returns the time zone of the current session. SQL> select ROUND(sysdate, 'year') 'round date' from dual If you omit fmt, then date is rounded to the nearest day. ROUND returns date rounded to the unit specified by the format model fmt. SQL> select NUMTOYMINTERVAL(1,'year') 'NUMTOYMINTERVAL' from dual NUMTOYMINTERVAL converts number n to an INTERVAL YEAR TO MONTH literal. SQL> select NUMTODSINTERVAL(10, 'hour') 'NUMTODSINTERVAL' from dual NUMTODSINTERVAL converts n to an INTERVAL DAY TO SECOND literal. SQL> select NEXT_DAY(sysdate, 'FRIDAY') 'NEXT_DAY' from dual NEXT_DAY returns the date of the first weekday named by char that is later than the date date. SQL> ALTER SESSION SET NLS_DATE_FORMAT = 'DD-MON-YYYY HH24:MI:SS' NEW_TIME returns the date and time in time zone timezone2 when date and time in time zone timezone1 are date. SQL> select MONTHS_BETWEEN(sysdate+365, sysdate) MONTHS_BETWEEN from dual MONTHS_BETWEEN returns number of months between dates date1 and date2. LOCALTIMESTAMP returns the current date and time in the session time zone in a value of datatype TIMESTAMP. LAST_DAY returns the date of the last day of the month that contains date. SQL> select extract(year from sysdate) 'year',įROM_TZ converts a timestamp value and a time zone to a TIMESTAMP WITH TIME ZONE value. SQL> select ADD_MONTHS(sysdate, 1) 'ADD_MONTHS' from dual ĬURRENT_DATE returns the current date in the session time zoneĬURRENT_TIMESTAMP returns the current date and time in the session time zoneĭBTIMEZONE returns the value of the database time zone.ĮXTRACT extracts and returns the value of a specified datetime field from a datetime or interval value expression. The remaining datetime functions were designed to accept any of the three types of data (date, timestamp, and interval) and to return a value of one of these types.ĪDD_MONTHS returns the date dateplus integer months. The exceptions are the MONTHS_BETWEEN function, which returns a number, and the ROUND and TRUNC functions, which do not accept timestamp or interval values at all. If you provide a timestamp value as their argument, Oracle Database internally converts the input type to a DATE value and returns a DATE value. Some of the datetime functions were designed for the Oracle DATE datatype (ADD_MONTHS, CURRENT_DATE, LAST_DAY, NEW_TIME, and NEXT_DAY). Year, spelled out “S” prefixes BC dates with “-“.Ĥ-digit year “S” prefixes BC dates with “-“.ĭatetime functions operate on date (DATE), timestamp (TIMESTAMP, TIMESTAMP WITH TIME ZONE, and TIMESTAMP WITH LOCAL TIME ZONE), and interval (INTERVAL DAY TO SECOND, INTERVAL YEAR TO MONTH) values. Week of month (1-5) where week 1 starts on the first day of the month and ends on the seventh. Week of year (1-53) where week 1 starts on the first day of the year and continues to the seventh day of the year.

If you don’t want this functionality, simply enter the 4-digit year. If 2-digit, provides the same return as RR. Given a year with 2 digits, returns a year in the next century if the year is =50 returns a year in the preceding century if the year is >=50 and the last 2 digits of the current year are <50. Name of month, padded with blanks to length of 9 characters. Number specified with ‘J’ must be integers. Julian day the number of days since JanuBC.

#Oracle week number iso

Week of year (1-52 or 1-53) based on the ISO standard. Name of day, padded with blanks to length of 9 characters.Ībbreviated era name (Japanese Imperial, ROC Official, and Thai Buddha calendars).įull era name (Japanese Imperial, ROC Official, and Thai Buddha calendars). One greater than the first two digits of a four-digit year “S” prefixes BC dates with “-“. Meridian indicator with or without periods. Punctuation and quoted text is reproduced in the result.

TO_DATE converts characters ( char of CHAR, VARCHAR2, NCHAR, or NVARCHAR2 datatype ) to date format.įor example you can review the following conversions. I will explain Oracle TO_DATE | Convert Datetime to Date in this post.