TIMESTAMP types are related. This section describes their characteristics, how they are similar, and how they differ. MySQL recognizes
TIMESTAMP values in several formats, described in Section 9.1.3, “Date and Time Literals”. For the
DATETIME range descriptions, “supported” means that although earlier values might work, there is no guarantee.
DATE type is used for values with a date part but no time part. MySQL retrieves and displays
DATE values in
' format. The supported range is
DATETIME type is used for values that contain both date and time parts. MySQL retrieves and displays
DATETIME values in
' format. The supported range is
'1000-01-01 00:00:00' to
Mysql Datetime To Utc Timestamp
UTCTIMESTAMP function. In MySQL, the UTCTIMESTAMP returns the current UTC date and time as a value in 'YYYY-MM-DD HH:MM:SS' or YYYYMMDDHHMMSS.uuuuuu format depending on the usage of the function i.e. In a string or numeric context. Note: Since UTCTIMESTAMP works on current datetime, your output may vary from the output shown. If 'localtime' follows a time that is not UTC, then the behavior is undefined. The 'utc' modifier is the opposite of 'localtime'. 'utc' assumes that the time value to its left is in the local timezone and adjusts that time value to be in UTC. If the time to the left is not in localtime, then the result of 'utc' is undefined. Luckily, SQL Server 2016 introduced us to the DATETIMEOFFSET data type and the AT TIME ZONE clause. This means you can convert the input datetime to your local timezone, convert this to UTC and finally convert that result to datetime again. “MySQL converts TIMESTAMP values from the current time zone to UTC for storage, and back from UTC to the current time zone for retrieval. (This does not occur for other types such as DATETIME.)”. So how does this impact your implementation and whether to choose DATETIME or TIMESTAMP as your data type? The DATETIME value is the local time of the server running MySQL in whatever time zone that is. If all you are ever doing only concerns one server in one time zone, DATETIME will probably fit most.
TIMESTAMP data type is used for values that contain both date and time parts.
TIMESTAMP has a range of
'1970-01-01 00:00:01' UTC to
'2038-01-19 03:14:07' UTC.
Universal Time and Pacific Standard Time Converter Calculator, UTC and PST Conversion Table. Converting UTC to PST. This time zone converter lets you visually and very quickly convert UTC to PST and vice-versa. Simply mouse over the colored hour-tiles and glance at the hours selected by the column. UTC stands for Universal Time. PST is known as Pacific Standard Time. PST is 7 hours behind UTC. 1600 utc to pst.
TIMESTAMP value can include a trailing fractional seconds part in up to microseconds (6 digits) precision. In particular, any fractional part in a value inserted into a
TIMESTAMP column is stored rather than discarded. With the fractional part included, the format for these values is
', the range for
DATETIME values is
'1000-01-01 00:00:00.000000' to
'9999-12-31 23:59:59.999999', and the range for
TIMESTAMP values is
'1970-01-01 00:00:01.000000' to
'2038-01-19 03:14:07.999999'. The fractional part should always be separated from the rest of the time by a decimal point; no other fractional seconds delimiter is recognized. For information about fractional seconds support in MySQL, see Section 11.2.6, “Fractional Seconds in Time Values”.
DATETIME data types offer automatic initialization and updating to the current date and time. For more information, see Section 11.2.5, “Automatic Initialization and Updating for TIMESTAMP and DATETIME”.
TIMESTAMP values from the current time zone to UTC for storage, and back from UTC to the current time zone for retrieval. (This does not occur for other types such as
DATETIME.) By default, the current time zone for each connection is the server's time. The time zone can be set on a per-connection basis. As long as the time zone setting remains constant, you get back the same value you store. If you store a
TIMESTAMP value, and then change the time zone and retrieve the value, the retrieved value is different from the value you stored. This occurs because the same time zone was not used for conversion in both directions. The current time zone is available as the value of the
time_zone system variable. For more information, see Section 5.1.15, “MySQL Server Time Zone Support”.
As of MySQL 8.0.19, you can specify a time zone offset when inserting
DATETIME values into a table. The offset is appended to the time part of a datetime literal, with no intravening spaces, and uses the same format used for setting the
time_zone system variable, with the following exceptions:
Mysql Convert Timestamp To Utc
For hour values less than than 10, a leading zero is required.
Time zone names such as
'Asia/Shanghai'cannot be used;
'SYSTEM'also cannot be used in this context.
The value inserted must not have a zero for the month part, the day part, or both parts. This is enforced beginning with MySQL 8.0.22, regardless of the server SQL mode setting.
This example illustrates inserting datetime values with time zone offsets into
DATETIME columns using different
time_zone settings, and then retrieving them:
The offset is not displayed when selecting a datetime value, even if one was used when inserting it.
The range of supported offset values is
Datetime literals that include time zone offsets are accepted as parameter values by prepared statements.
TIMESTAMP values are converted to the “zero” value of the appropriate type (
'0000-00-00 00:00:00'), if the SQL mode permits this conversion. The precise behavior depends on which if any of strict SQL mode and the
NO_ZERO_DATE SQL mode are enabled; see Section 5.1.11, “Server SQL Modes”.
In MySQL 8.0.22 and later, you can convert
TIMESTAMP values to UTC
DATETIME values when retrieving them using
CAST() with the
AT TIME ZONE operator, as shown here:
For complete information regarding syntax and additional examples, see the description of the
Be aware of certain properties of date value interpretation in MySQL:
Mysql Datetime Utc Download
MySQL permits a “relaxed” format for values specified as strings, in which any punctuation character may be used as the delimiter between date parts or time parts. In some cases, this syntax can be deceiving. For example, a value such as
'10:11:12'might look like a time value because of the
:, but is interpreted as the year
'2010-11-12'if used in date context. The value
'10:45:15'is converted to
'45'is not a valid month.
The only delimiter recognized between a date and time part and a fractional seconds part is the decimal point.
The server requires that month and day values be valid, and not merely in the range 1 to 12 and 1 to 31, respectively. With strict mode disabled, invalid dates such as
'2004-04-31'are converted to
'0000-00-00'and a warning is generated. With strict mode enabled, invalid dates generate an error. To permit such dates, enable
ALLOW_INVALID_DATES. See Section 5.1.11, “Server SQL Modes”, for more information.
MySQL does not accept
TIMESTAMPvalues that include a zero in the day or month column or values that are not a valid date. The sole exception to this rule is the special “zero” value
'0000-00-00 00:00:00', if the SQL mode permits this value. The precise behavior depends on which if any of strict SQL mode and the
NO_ZERO_DATESQL mode are enabled; see Section 5.1.11, “Server SQL Modes”.
Dates containing 2-digit year values are ambiguous because the century is unknown. MySQL interprets 2-digit year values using these rules:
Year values in the range
Year values in the range
See also Section 11.2.8, “2-Digit Years in Dates”.