UTC_TIMESTAMP() function In MySQL, the UTC_TIMESTAMP 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 UTC_TIMESTAMP() works on current ...
The `UNIX_TIMESTAMP()` function in MySQL returns the current Unix timestamp, which is the number of seconds that have elapsed since '1970-01-01 00:00:00' UTC. It can also convert a provided date expression to a Unix timestamp. Usage The `UNIX_TIMESTAMP()` function is used to retrie...
The `TIMESTAMPDIFF()` function in MySQL calculates the difference between two date or datetime expressions. It returns the result in the specified unit, such as seconds, minutes, hours, days, or years. Usage The function is used to determine the time interval between two dates in a chosen ...
Can anyone see anything wrong with the way I am using the MySQL unix_timestamp function in this snippet from a query? $importdata="INSERT INTO import (date, gluc, humilog, regular, lantus, carbs) VALUES (unix_timestamp('2004-08-01 05:04:00'),152,02.0,00.0,00.0,00.0) ...
If set toSYSTEM, every MySQL function call that requires a time zone calculation makes a system library call to determine the current system time zone. This call may be protected by a global mutex, resulting in contention. 虽然通过TIMESTAMP可以自动转换时区,代价是当MySQL参数time_zone=system时每次...
The LOCALTIMESTAMP() function returns the current date and time. Note:The date and time is returned as "YYYY-MM-DD HH-MM-SS" (string) or as YYYYMMDDHHMMSS.uuuuuu (numeric). Syntax LOCALTIMESTAMP() Technical Details Works in:From MySQL 4.0 ...
MySQL UNIX_TIMESTAMP() returns a Unix timestamp in seconds since '1970-01-01 00:00:00' UTC as an unsigned integer if no arguments are passed with UNIX_TIMESTAMP(). When this function used with a date argument, it returns the value of the argument as an unsigned integer in seconds sin...
CREATE FUNCTION 函数名(参数列表) RETURNS 返回类型 BEGIN 函数体(一定有return语句); END 结束符 调用语法: SELECT 函数名(参数列表) 查看函数: SHOW CREATE FUNCTION my_f3; 删除函数: DROP FUNCTION my_f3; 1.【无参有返回】 # 返回个数 1
select * from stu where math in (18,25,66); --查询stu表中,math为18,25,66的数据 3.like 模糊查询 _表示一个字符 %表示多个字符 select * from stu where name like '张_'; --查询name为 ’张‘ 开头的两个字的数据 select * from stu where name like ’张%‘; --查询name为 ’张‘ 开...
For complete information regarding syntax and additional examples, see the description of theCAST()function. 有关语法和其他示例的完整信息,请参阅CAST()函数的说明。 Be aware of certain properties of date value interpretation in MySQL: 注意MySQL 中日期值解释的某些属性: ...