The difference between date and timestamp in oracle
In Oracle, DATE only stores the date part, accurate to days, while TIMESTAMP stores date and time parts, accurate to microseconds, and can store time zone offsets. They also differ in storage space, scope and format. Best practice is to choose the appropriate type based on the information you need to store: use DATE if you need only date information, or TIMESTAMP if you need precise time and time zone information.
The difference between DATE and TIMESTAMP in Oracle
The DATE and TIMESTAMP data types in Oracle are used to store dates and time values, but there are some key differences between them.
Definition
- DATE: Stores a value that contains only the date part (year, month, day).
- TIMESTAMP: Stores the value of date and time parts (year, month, day, hour, minute, second) and can be accurate to microseconds.
Accuracy
- DATE: Accurate to the day.
- TIMESTAMP: Accurate to microseconds.
Range
- DATE: Range from January 1, 4712 BC to December 31, 9999 AD day.
- TIMESTAMP: Ranges from January 1, 4712 BC 00:00:00.000000 to December 31, 9999 AD 23:59:59.999999.
Time Zone
- DATE: There is no time zone related information.
- TIMESTAMP: Can store a time zone offset, allowing the date and time to be stored relative to a specific time zone.
Format
- DATE: The format is 'YYYY-MM-DD'.
- TIMESTAMP: The format is 'YYYY-MM-DD HH:MM:SS.ffffffffff', where ffffffffff represents the decimal part (microseconds).
Storage space
- DATE: 7 bytes
- TIMESTAMP: 11 Bytes
Example
- DATE value: 2023-03-08
- TIMESTAMP value: 2023-03- 08 14:30:15.123456
Best Practice
- Use the DATE data type to store values that only contain date information.
- Use the TIMESTAMP data type to store date and time values that require precise time information.
- Consider storing time zone offsets to handle dates and times in different time zones.
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