Overview
Description
Date types include DATE, TIME and DATETIME, DATE type only stores the date accurate to the day, DATETIME type stores the date and time, which can be accurate to microseconds. TIME type only stores the time, and does not support the construction of the table storage for the time being, can only be used in the query process.
Do calculation for datetime types or converting them to numeric types, please use functions like TIME_TO_SEC, DATE_DIFF, UNIX_TIMESTAMP . The result of directly converting them as numeric types as not guaranteed.
For more information refer to DATE, TIME and DATETIME documents.