Explain what the open dating system is
Epochs are generally chosen to be convenient or significant by a consensus of the time scale's initial users, or by authoritarian fiat.The epoch moment or date is usually defined by a specific clear event, condition, or criterion—the epoch event or epoch criterion—from which the period or era or age is usually characterized or described.Regular updates help the optimizer choose the most efficient plan for executing your queries.In the fields of chronology and periodization, an epoch is an instant in time chosen as the origin of a particular era.The time in these systems is stored as the quantity of a particular time unit (days, seconds, nanoseconds, etc.) that has elapsed since a stated time (usually midnight UTC at the beginning of the given date).While logically January 0, 1900 is equivalent to December 31, 1899, these systems do not allow users to specify the latter date.
In astronomy, an epoch is a specific moment in time for which celestial coordinates or orbital elements are specified, and from which other orbital parametrics are thereafter calculated in order to predict future position.
Stale statistics can cause the optimizer to choose a less-than-optimal plan for executing a query.
The query plan that the EXPLAIN statement creates contains information about statistics.
Since 1900 is incorrectly treated as a leap year in these systems, January 0, 1900 actually corresponds to the historical date of December 30, 1899.
Computers do not generally store arbitrarily large numbers.