Time - Unit


Measurement of time is built on units, such as:

Unit of time are used to:

  • define an instant. The more unit, the more precision
  • define an amount of time (ie duration or period) when every unit has a quantity (2 year, …)

Second is the base unit of time in the International System of Units (SI), see Time - Second

The units of time are also known as the datetime fields because they make up a date time value.

Documentation / Reference

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SQL - TIME data type

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Time - Comparison

Items of type time are mutually comparable only if they have the same datetime fields See also
Time - Day

A day is a unit of time. If you add the unit year and month, you get a date. Over time the average length of the day is getting longer as the Earth slows. As a result, the length of a solar day in 2012...
Time - Month

A month is a unit of time. days

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