Oracle dates and timestamps
More about Oracle and languages will be covered in separate article The exception to padding month names are languages using cyrilic alphabet or portions of it (Russina, Ukrainian, Greek, Bulgarian) - for those languages no additional spaces are added
For 2 digit input, a value between '00' and '49' returns the year in the same century, and a value between '50' and '99' returns a year in the previous century
Note, in particular, the examples that use the 'Day' format mask - compare the meaning of 'Day' in trunc and round to its meaning in my earlier discussion of date formats . However, there is interesting additional functionality in both functions: they both take an optional second argument; a format which specifies a (non default) level of truncation or rounding
SQL Troubles: Oracle vs. SQL Server: Date Conversion
http://sql-troubles.blogspot.com/2010/02/oracle-vs-sql-server-date-conversion.htmlThe author does not accept any responsibility from the use of the information or tools mentioned within this blog, and recommends adequate evaluation against own requirements and judgement to assess suitability. Except the cases when the source was directly specified, the information, opinions and views expressed are those of the author and do not necessarily state or reflect those of any othercompany with direct or indirect affiliation to the products or subjects discussed
http://oracleeducation.blogspot.com/2007/05/oracle-date-format_22.htmlWithout FM, the result of a character element is always right padded with blanks to a fixed length, and leading zeroes are always returned for a number element. Table 3-16 The RR Date Element FormatIf the specified two-digit year is 0 - 49 50 - 99 If the last two digits of the current year are: 0-49 The return date is in the current century
What needs to be realized when doing the calculation is that when you do subtraction between dates, you get a number that represents the number of days. The problem with the DATE datatype is its' granularity when trying to determine a time interval between two events when the events happen within a second of each other
There is also the option of specifying a date format at the session level, a capability that can come in handy if your particular needs differ from those of the majority of database users. The first day of the ISO year is always a Monday, and is determined by the following rules: When January 1 falls on a Monday, the ISO year begins on the same day
Oracle, selecting Week ending date
By doing it in this way, you can generate any type of Static XML, Remember the word Static which i had used over here, you will come to know why i had termed it as Static at the end of this article. - 2014 EE Annual Survey EXPERT WHO ANSWERED sdstuber sdstuber has answered 5,830 questions on Experts Exchange and is an expert in Oracle Database, Query Syntax and Databases
About Oracle: Date format element 'ww'
http://rwijk.blogspot.com/2008/01/date-format-element-ww.htmlThe 'iw' element is a little different in that January 1 can be week 53 of the previous year if it is a Friday, Saturday or Sunday.Today, my boss - who has worked with Oracle for 18 years now - was surprised to see that Monday, January 28 2008 is week 4 and Tuesday, January 29 2008 is week 5. This algorithm does not follow the ISO standard (2015, 1992-06-15).WW No 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.Which again shows that in our business one should never assume, but always read the documentation and verify by testing
There are preset formats using the CONVERT function, but you would need to look up the integer corresponding to the format you want, which may or may not be there
Oracle Date Format
SUN) J Julian Day (number of days since January 1 4713 BC, where January 1 4713 BC is 1 in Oracle) HH Hournumber of the day (1-12) HH12 Hournumber of the day (1-12) HH24 Hournumber of the day with 24Hours notation (0-23) AM AM or PM PM AM or PM MI Number of minutes (i.e
For example, the following SQL statement creates a relation with an attribute of type DATE: create table x(a int, b date); DATE Format When a DATE value is displayed, Oracle must first convert that value from the special internal format to a printable string. In this example, if "Current Time" is not quoted, it would have been interpreted as two case insensitive names CURRENT and TIME, which would actually cause a syntax error
LOCALTIMESTAMP function in oracle This explains how to get the current date and time in the time zone of the current SQL session which is set by the Alter session command
While Oracle will perform implicit conversions of datatypes for you, this could lead to performance problems in your applications and to compatibility problems in future versions of Oracle
The format mask parameters for date expression are listed as following: (They could be used in combinations) Parameter Explanation YEAR Year in characters YYYY 4-digit year YY 2-digit year IYYY 4-digit ISO year IY 2-digit ISO year RRRR Take a 2-digit year as input and a 4-digit year as output
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Oracle Date Functions
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It can be one or a combination of the following values: Parameter Explanation YEAR Year, spelled out YYYY 4-digit year YYY YY Y Last 3, 2, or 1 digit(s) of year
Think twice, for example, before reading a TIMESTAMP value from a table into a DATE variable, because you might lose information (in this case, the fractional seconds and perhaps the time zone). Unlike strings and numbers, dates are quite complicated: not only are they highly formatted data, but there are also many rules for determining valid values and valid calculations (leap days and years, daylight saving time changes, national and company holidays, date ranges, and so on)
Oracle SQL - Find the current day of the week
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Using oracle date format
SUN) J Julian Day (number of days since January 1 4713 BC, where January 1 4713 BC is 1 in Oracle) HH Hournumber of the day (1-12) HH12 Hournumber of the day (1-12) HH24 Hournumber of the day with 24Hours notation (0-23) AM AM or PM PM AM or PM MI Number of minutes (i.e
Format Models
For lists of number and datetime format model elements, see Table 2-17, "Matching Character Data and Format Models with the FX Format Model Modifier" and Table 2-19, "Attributes of the XMLFormat Object". Without FM, the result of a character element is always right padded with blanks to a fixed length, and leading zeroes are always returned for a number element
REPORT mydatetime MYDATETIME -------------- FEB-2007-02-10 Scripting on this page enhances content navigation, but does not change the content in any way. Datetime Format Elements and Globalization Support The functionality of some datetime format elements depends on the country and language in which you are using Oracle Database
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