1、DATE_ADD(date,INTERVAL expr type) 向日期添加指定的时间间隔; date: 参数是合法的日期表达式 expr: 参数是您希望添加的时间间隔 type:时间单位 2、TIMESTAMPDIFF(unit,time1,time2) 返回指定时间单位的 时间差 unit:单位 time1:时间1 time2:时间2 3、DATEDIFF(time1,time2) 返回2个时间的间隔天数 4、...
One of my other InformIT.com articles covered the functions DATEPART and DATENAME in detail. DATEPART retrieves a portion of the date and time value (month, day, weekday, year, hour, minute, and so on) as an integer; DATENAME returns the character (for weekdays) or integer (for everyth...
The following sections in this topic provide an overview of all Transact-SQL date and time data types and functions. For information and examples that are common to date and time data types and functions, see Using Date and Time Data. Date and Time Data Types Date and Time Functions ...
What are date and time functions? Why use date and time functions? How to get the current date and time in SQL What is a time series database? Conclusion Stop flying blind Be the first to get the latest tutorials, trainings, and all things InfluxDB, Telegraf, and more—right in your ...
This is a key difference between a streaming query and a traditional RDMS query: streaming queries remain "open," producing more data, so the timestamp for when the query was run does not offer good information. LOCALTIMESTAMP, LOCALTIME, CURRENT_DATE, and CURRENT_TIMESTAMP all produce ...
DATE_ADD 命令格式 datedate_add(date|timestamp|string<startdate>,bigint<delta>) 命令说明 按照delta幅度增减startdate日期的天数。如果您需要获取在当前时间基础上指定变动幅度的日期,请结合GETDATE函数使用。 本命令与DATE_SUB的增减逻辑相反。 参数说明 ...
Commonly Used Date Functions GETDATE() This function is used to get the current date and time. For example, SELECTGETDATE(); Here, the function returns the current date and time. CURRENT_TIMESTAMP This function is used to get the current timestamp in the system. For example, ...
SmallDateTime(SQL Server)data type can store only the date in YYYY-MM-DD hh:mm:ss format. DateTime2data type can store the date and the time in YYYY-MM-DD hh:mm:ss[.nnnnnnn] format. It can store nanoseconds. Working With SQL Date Functions ...
Date and time data types Date and time functions Functions that return system date and time values Functions that return date and time parts Functions that return date and time values from their parts Functions that return date and time difference values Functions that modify date and time values...
TIMEFROMPARTSTIMEFROMPARTS ( hour, minute, seconds, fractions, precision )对指定的时间返回 time 值(具有指定精度)。time( precision )Deterministic 返回日期和时间差异值的函数 函数语法返回值返回数据类型确定性 DATEDIFFDATEDIFF ( datepart, startdate, enddate )返回两个指定日期之间所跨的日期或时间 datepart ...