The formats used by mysql to create table time are: 1. DATETIME data type, which can be used in any MySQL version. It stores a wide range of time ranges, including ancient times and the distant future. It is not affected by time zones and is suitable for many applications. Regional applications or application scenarios that require a specific point in time; 2. TIMESTAMP data type, which takes up less storage space and only requires 4 bytes. It has an automatic update function and automatically updates to the current time when inserting or updating data.
Operating system for this tutorial: Windows 10 system, MySQL 8 version, Dell G3 computer.
In MySQL, you can use the DATETIME or TIMESTAMP data type to store time information.
Both formats have their own advantages:
1. DATETIME:
DATETIME data type starts with 'YYYY-MM-DD HH: MM:SS' format to represent date and time. It ranges from '1000-01-01 00:00:00' to '9999-12-31 23:59:59'. DATETIME stores times as absolute values, regardless of time zone.
Advantages:
Can be used in any MySQL version because it is a standard SQL data type.
Can store a wide range of time ranges, including ancient times and the distant future.
is not affected by time zones and is suitable for multi-regional applications or application scenarios that require specific time points.
2. TIMESTAMP:
TIMESTAMP data type represents date and time in the format of 'YYYY-MM-DD HH:MM:SS' time. It ranges from '1970-01-01 00:00:01' UTC to '2038-01-19 03:14:07' UTC. TIMESTAMP stores times relative to UTC, but can be converted by setting the time zone.
Advantages:
Occupies smaller storage space, requiring only 4 bytes, compared to 8 bytes for DATETIME.
Automatic update function: You can set the default value to CURRENT_TIMESTAMP, and it will automatically update to the current time when inserting or updating data, which is very convenient.
The choice of which format to use depends on your specific needs. If you need to store absolute time values, independent of time zones, and need to support a wider time range, you can choose DATETIME. If storage space is important or you need the ability to automatically update timestamps, choose TIMESTAMP.
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