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  2. Timestamp - Wikipedia

    en.wikipedia.org/wiki/Timestamp

    The term "timestamp" derives from rubber stamps used in offices to stamp the current date, and sometimes time, in ink on paper documents, to record when the document was received. Common examples of this type of timestamp are a postmark on a letter or the "in" and "out" times on a time card.

  3. Year 2038 problem - Wikipedia

    en.wikipedia.org/wiki/Year_2038_problem

    PostgreSQL since version 7.2, released 2002-02-04, stores timestamp WITHOUT TIMEZONE as 64-bit. [31] [failed verification] Prior versions already stored timestamp as 64-bit. [citation needed] As of MySQL 8.0.28, released in January 2022, the functions FROM_UNIXTIME(), UNIX_TIMESTAMP(), and CONVERT_TZ() handle 64-bit values on platforms that ...

  4. Unix time - Wikipedia

    en.wikipedia.org/wiki/Unix_time

    For example, 00:00:00 UTC on 1 January 1971 is represented in Unix time as 31 536 000. Negative values, on systems that support them, indicate times before the Unix epoch, with the value decreasing by 1 for every non-leap second before the epoch. For example, 00:00:00 UTC on 1 January 1969 is represented in Unix time as −31 536 000.

  5. Epoch (computing) - Wikipedia

    en.wikipedia.org/wiki/Epoch_(computing)

    Software timekeeping systems vary widely in the resolution of time measurement; some systems may use time units as large as a day, while others may use nanoseconds.For example, for an epoch date of midnight UTC (00:00) on 1 January 1900, and a time unit of a second, the time of the midnight (24:00) between 1 January 1900 and 2 January 1900 is represented by the number 86400, the number of ...

  6. Timestamp-based concurrency control - Wikipedia

    en.wikipedia.org/wiki/Timestamp-based...

    In this case, if the transaction's timestamp is after the object's read timestamp, the read timestamp is set to the transaction's timestamp. If a transaction wants to write to an object, but the transaction started before the object's read timestamp it means that something has had a look at the object, and we assume it took a copy of the object ...

  7. Template:Timestamp - Wikipedia

    en.wikipedia.org/wiki/Template:Timestamp

    is the template equivalent for the magic word (also known as variable) {{CURRENTTIMESTAMP}}. The template invokes this variable when called. Due to MediaWiki and browser caching, these variables frequently show when the page was cached rather than the current time.

  8. Timestamping (computing) - Wikipedia

    en.wikipedia.org/wiki/Timestamping_(computing)

    In computing, timestamping refers to the use of an electronic timestamp to provide a temporal order among a set of events. Timestamping techniques are used in a variety of computing fields, from network management and computer security to concurrency control .

  9. Transaction time - Wikipedia

    en.wikipedia.org/wiki/Transaction_time

    It is a technical timeline controlled by a integration layer (for example a data warehouse). [1] More formally, it is the point-in-time during which a fact stored in the database is considered to be true. The period is an interval based on load times (called load datetime in data vault [1] [2]), also called inscription timestamp. [1]