What is the size of timestamp?
Table of Contents
- 1 What is the size of timestamp?
- 2 What is the size of date and time?
- 3 What is the size of date?
- 4 What is the maximum size of the date time field?
- 5 How big is an object in Java?
- 6 What is a timestamp date?
- 7 What is the difference between timestamp and localdatetime in Java?
- 8 How do I convert date to timestamp in SQL?
- 9 What is wrong with the timestamp equals method in Java?
What is the size of timestamp?
8.5. Date/Time Types
| Name | Storage Size | Description |
|---|---|---|
| timestamp [ (p) ] [ without time zone ] | 8 bytes | both date and time (no time zone) |
| timestamp [ (p) ] with time zone | 8 bytes | both date and time, with time zone |
| date | 4 bytes | date (no time of day) |
| time [ (p) ] [ without time zone ] | 8 bytes | time of day (no date) |
What is the size of date and time?
The internal representation of a timestamp is a string of 7 – 13 bytes. Each byte consists of 2 packed decimal digits. The first 4 bytes represent the date, the next 3 bytes the time, and the last 0 – 6 bytes the fractions of a second.
What is the size of date?
Date is 32 bytes.
How many bytes is a timestamp?
4 bytes
10.9 Date and Time Data Type Representation
| Type | Storage before MySQL 5.6.4 | Storage as of MySQL 5.6.4 |
|---|---|---|
| TIMESTAMP | 4 bytes, little endian | 4 bytes + fractional-seconds storage, big endian |
| DATETIME | 8 bytes, little endian | 5 bytes + fractional-seconds storage, big endian |
What is timestamp with timezone?
The TIMESTAMP WITH TIME ZONE (or TIMESTAMPTZ) data type stores 8-byte date values that include timestamp and time zone information in UTC format. You cannot define a TIMESTAMPTZ column with a specific precision for fractional seconds other than 6. The timestamp is converted to UTC +1:00 (an 8-hour offset).
What is the maximum size of the date time field?
Answer: The maximum length of an ingresdate interval is 57 characters.
How big is an object in Java?
Objects, References and Wrapper Classes. Minimum object size is 16 bytes for modern 64-bit JDK since the object has 12-byte header, padded to a multiple of 8 bytes. In 32-bit JDK, the overhead is 8 bytes, padded to a multiple of 4 bytes.
What is a timestamp date?
A timestamp is a sequence of characters or encoded information identifying when a certain event occurred, usually giving date and time of day, sometimes accurate to a small fraction of a second. In modern times usage of the term has expanded to refer to digital date and time information attached to digital data.
What is timestamp format?
The format of a TIMESTAMP is YYYY-MM-DD HH:MM:SS which is fixed at 19 characters. The TIMESTAMP value has a range from ‘1970-01-01 00:00:01’ UTC to ‘2038-01-19 03:14:07’ UTC . When you insert a TIMESTAMP value into a table, MySQL converts it from your connection’s time zone to UTC for storing.
How to convert timestamp to a long value in Java?
Since the constructor of the Date class requires a long value, we need to convert the Timestamp object into a long value using the getTime () method of the TimeStamp class (present in SQL package). In order to import date class syntax is as follows: import java.util.Date ;
What is the difference between timestamp and localdatetime in Java?
Both java.util.Date and and java.sql.Timestamp are actually equivalents of java.time.Instant, not LocalDateTime, Date Timestamp and Instant are instances of Unix time, while LocalDateTime is a DateTime in current time zone. You can clearly see that because both classes feature this nice method (inherited from java.util.Date ):
How do I convert date to timestamp in SQL?
We can convert date to timestamp using the Timestamp class which is present in the sql package . The constructor of the time-stamp class requires a long value. So data needs to be converted into a long value by using the getTime () method of the date class (which is present in the util package).
What is wrong with the timestamp equals method in Java?
The Timestamp.equals (Object) method never returns true when passed an object that isn’t an instance of java.sql.Timestamp , because the nanos component of a date is unknown. As a result, the Timestamp.equals (Object) method is not symmetric with respect to the java.util.Date.equals (Object) method.