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The current system date / time of the database server can be called by using functions like CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIME, or LOCALTIMESTAMP. (Popular vendor specific functions are TO_DATE, TO_TIME, TO_TIMESTAMP, YEAR, MONTH, DAY, HOUR, MINUTE, SECOND, DAYOFYEAR, DAYOFMONTH and DAYOFWEEK.) Interval (datetime)
National standard format is yyyy-mm-dd. [161] dd.mm.yyyy format is used in some places where it is required by EU regulations, for example for best-before dates on food [162] and on driver's licenses. d/m format is used casually, when the year is obvious from the context, and for date ranges, e.g. 28-31/8 for 28–31 August.
SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...
Month-day-year or day-month-year. If a number for a day is missing, date sorting is broken. Abbreviated months work too. The year must be on the end, and a number can not be used for the month. Either will break date sorting. Date sorting works correctly in the first 2 tables below. Years before 100 (for example, year 99) break sorting.
The first Sunday before December 19, 2024 is given by "{{Weekday before date|2024|December|19|Sunday}}" as "December 15, 2024". In the following table, 31 October 2010 is a Sunday. Syntax
Day–month–year (DMY) format—e.g., 12 January 2025 or 12 Jan 2025; Month–day–year (MDY) format—e.g., January 12, 2025 or Jan 12, 2025 ; Year–month–day (YMD) format—e.g., 2025-01-12 (also called the "all-numeric" format; used only where space is limited, such as in references and some tables and infoboxes, but not in article ...
Reserved words in SQL and related products In SQL:2023 [3] In IBM Db2 13 [4] In Mimer SQL 11.0 [5] In MySQL 8.0 [6] In Oracle Database 23c [7] In PostgreSQL 16 [1] In Microsoft SQL Server 2022 [2]
[17] The separator used between date values (year, month, week, and day) is the hyphen, while the colon is used as the separator between time values (hours, minutes, and seconds). For example, the 6th day of the 1st month of the year 2009 may be written as "2009-01-06" in the extended format or as "20090106" in the basic format without ambiguity.